Add tutorials and update documentation

[ghiggi]

Prework

• [ ] I understand and agree to this repository's code of conduct.
• [ ] I understand and agree to this repository's contributing guidelines.
• [ ] I have already submitted an issue or discussion thread to discuss my idea with the maintainers.

What kind of change does this PR introduce? (check at least one)

• [ ] Bugfix
• [ ] Feature
• [ ] Documentation
• [ ] Tutorial
• [ ] Code style update
• [ ] Refactor
• [ ] Build-related changes
• [ ] Other, please describe:

Does this PR introduce a breaking change? (check one)

• [ ] Yes
• [ ] No

If yes, please describe the impact and communicate accordingly:

The PR fulfills these requirements:

• [ ] It's submitted to the branch named as follow:
  • Fix a bug: bugfix-<some_key>-<word>
  • Improve the doc: doc-<some_key>-<word>
  • Improve a tutorial tutorial-<some_key>-<word>
  • Add a new feature: feature-<some_key>-<word>
  • Refactor some code: refactor-<some_key>-<word>
  • Optimize some code: optimize-<some_key>-<word>
• [ ] When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
• [ ] Don't forget to link PR to issue if you are solving one.
• [ ] All tests are passing.
• [ ] New/updated tests are included

If adding a new feature, the PR's description includes:

• [ ] A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:

Related GitHub issues and pull requests

• Ref: #

Summary

Please explain the purpose and scope of your contribution.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 98.29932% with 5 lines in your changes missing coverage. Please review.

Project coverage is 93.04%. Comparing base (299b4d8) to head (ad63db5).

Files	Patch %	Lines
gpm/io/products.py	33.33%	2 Missing :warning:
gpm/utils/directories.py	97.64%	2 Missing :warning:
gpm/io/checks.py	85.71%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #59 +/- ## ========================================== + Coverage 92.84% 93.04% +0.19% ========================================== Files 131 130 -1 Lines 14223 14268 +45 ========================================== + Hits 13205 13275 +70 + Misses 1018 993 -25 ```

:umbrella: View full report in Codecov by Sentry.
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[coveralls]

coverage: 93.031% (+0.2%) from 92.843% when pulling 62792b927700440093d8b1c55a59f09532d2dda1 on add-tutorials into 299b4d8a269bd51ca5ad4cd9d69a47ee11d4c34b on main.

[coveralls]

coverage: 93.031% (+0.2%) from 92.843% when pulling dc9566df43962161e279a37cd8deb601f6214682 on add-tutorials into 299b4d8a269bd51ca5ad4cd9d69a47ee11d4c34b on main.

[coveralls]

coverage: 93.031% (+0.2%) from 92.843% when pulling dc9566df43962161e279a37cd8deb601f6214682 on add-tutorials into 299b4d8a269bd51ca5ad4cd9d69a47ee11d4c34b on main.

[coveralls]

coverage: 93.043% (+0.2%) from 92.843% when pulling d4f57334ac84d53e5928255fee07ad2befbcaa66 on add-tutorials into 299b4d8a269bd51ca5ad4cd9d69a47ee11d4c34b on main.

[coveralls]

coverage: 93.044% (+0.2%) from 92.843% when pulling a2b05701b85721d5ae2239502c6140d85dc9496f on add-tutorials into 299b4d8a269bd51ca5ad4cd9d69a47ee11d4c34b on main.

[coveralls]

coverage: 93.04% (+0.2%) from 92.843% when pulling ad63db5024efcd9b8f08feca4e18e5054aaf2c07 on add-tutorials into 299b4d8a269bd51ca5ad4cd9d69a47ee11d4c34b on main.