Add CLI entrypoint

[lochhh]

Description

What is this PR

• [ ] Bug fix
• [x] Addition of a new feature
• [ ] Other

Why is this PR needed? This PR closes #168

What does this PR do? This PR adds the CLI entrypoint that allows users to print diagnostic info in the CLI using movement info to, for instance, verify that movement was installed successfully. This PR also paves the way for adding other commands like movement label to launch the napari GUI.

References

168

How has this PR been tested?

Tests have been added accordingly.

Does this PR require an update to the documentation?

Instructions to verify the movement installation have been added to the "Getting started" page.

Checklist:

• [x] The code has been tested locally
• [x] Tests have been added to cover all new functionality
• [x] The documentation has been updated to reflect any changes
• [x] The code has been formatted with pre-commit

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.67%. Comparing base (c7c07a6) to head (836f092).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #176 +/- ## ========================================== + Coverage 99.66% 99.67% +0.01% ========================================== Files 10 11 +1 Lines 591 610 +19 ========================================== + Hits 589 608 +19 Misses 2 2 ```

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[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[lochhh]

Love this! The only thing I'd add for now is "system" (as in Adam's mockup), if it's easy. Otherwise feel free to merge as is.

I tried System: {platform.system()} {platform.release()}" but the output contains what's already in platform.platform() - so I've reverted this again.