feat(tui): improve logging

[orhun]

Description

This PR improves the logging by using the log crate for events and also adds logging for the TUI.

Motivation and Context

Closes #11

How Has This Been Tested?

Unit tests.

Screenshots / Logs (if applicable)

TBA.

Types of Changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation (no code change)
• [ ] Refactor (refactoring production code)
• [ ] Other

Checklist:

• [x] My code follows the code style of this project.
• [x] I have updated the documentation accordingly.
• [x] I have formatted the code with rustfmt.
• [x] I checked the lints with clippy.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

Todos:

• [x] Add an argument for systeroid-tui for specifying the output file for logs
• [x] Add trace logs for systeroid-core
• [x] Possibly update the logger style for systeroid-tui
• [x] Update documentation about logging (RUST_LOG) and logger widget key bindings

[codecov-commenter]

Codecov Report

Patch coverage: 39.07% and project coverage change: -2.70 :warning:

Comparison is base (80be6c5) 79.64% compared to head (448fde8) 76.94%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #83 +/- ## ========================================== - Coverage 79.64% 76.94% -2.70% ========================================== Files 23 23 Lines 1429 1500 +71 ========================================== + Hits 1138 1154 +16 - Misses 291 346 +55 ``` | Flag | Coverage Δ | | |---|---|---| | unit-tests | `76.94% <39.07%> (-2.70%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z) | Coverage Δ | | |---|---|---| | [systeroid-tui/tests/integration\_test.rs](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#diff-c3lzdGVyb2lkLXR1aS90ZXN0cy9pbnRlZ3JhdGlvbl90ZXN0LnJz) | `100.00% <ø> (ø)` | | | [systeroid/src/main.rs](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#diff-c3lzdGVyb2lkL3NyYy9tYWluLnJz) | `0.00% <0.00%> (ø)` | | | [systeroid-tui/src/command.rs](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#diff-c3lzdGVyb2lkLXR1aS9zcmMvY29tbWFuZC5ycw==) | `76.82% <11.77%> (-21.26%)` | :arrow_down: | | [systeroid/src/app.rs](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#diff-c3lzdGVyb2lkL3NyYy9hcHAucnM=) | `62.61% <25.00%> (ø)` | | | [systeroid-tui/src/app.rs](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#diff-c3lzdGVyb2lkLXR1aS9zcmMvYXBwLnJz) | `63.45% <30.00%> (+0.08%)` | :arrow_up: | | [systeroid-tui/src/lib.rs](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#diff-c3lzdGVyb2lkLXR1aS9zcmMvbGliLnJz) | `58.83% <46.16%> (-2.71%)` | :arrow_down: | | [systeroid-tui/src/ui.rs](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#diff-c3lzdGVyb2lkLXR1aS9zcmMvdWkucnM=) | `76.68% <48.65%> (-6.48%)` | :arrow_down: | | [systeroid-core/src/config.rs](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#diff-c3lzdGVyb2lkLWNvcmUvc3JjL2NvbmZpZy5ycw==) | `98.15% <66.67%> (-1.85%)` | :arrow_down: | | [systeroid-core/src/sysctl/controller.rs](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#diff-c3lzdGVyb2lkLWNvcmUvc3JjL3N5c2N0bC9jb250cm9sbGVyLnJz) | `77.23% <77.78%> (-0.89%)` | :arrow_down: | | [systeroid-core/src/sysctl/parameter.rs](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z#diff-c3lzdGVyb2lkLWNvcmUvc3JjL3N5c2N0bC9wYXJhbWV0ZXIucnM=) | `90.22% <100.00%> (+0.11%)` | :arrow_up: | | ... and [2 more](https://codecov.io/gh/orhun/systeroid/pull/83?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z) | | ... and [1 file with indirect coverage changes](https://codecov.io/gh/orhun/systeroid/pull/83/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z) Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Orhun+Parmaks%C4%B1z)

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