docs(contrib): Add instructions on how to test changes

[lucasssvaz]

Description of Change

Add instructions on how to create and run tests.
Fix formatting.

Tests scenarios

Built locally

Related links

Closes #10185

[github-actions]

Warnings

⚠️

Some issues found for the commit messages in this PR: the commit message "Fix typo": summary looks empty type/action looks empty the commit message "Remove manual hooks as they do not exist anymore in the repo": summary looks empty type/action looks empty the commit message "fix(path): Fix file path": summary looks too short Please fix these commit messages - here are some basic tips: follow Conventional Commits style correct format of commit message should be: <type/action>(<scope/component>): <summary>, for example fix(esp32): Fixed startup timeout issue allowed types are: change,ci,docs,feat,fix,refactor,remove,revert,test sufficiently descriptive message summary should be between 20 to 72 characters and start with upper case letter avoid Jira references in commit messages (unavailable/irrelevant for our customers) TIP: Install pre-commit hooks and run this check when committing (uses the Conventional Precommit Linter).

	Messages
📖	You might consider squashing your 4 commits (simplifying branch history).

👋 Hello lucasssvaz, we appreciate your contribution to this project!

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[lucasssvaz]

@Jason2866 @mathieucarbou PTAL.
Any feedback is welcome

[mathieucarbou]

@Jason2866 @mathieucarbou PTAL. Any feedback is welcome

Thank you I will go though the doc when I will be back from vacation and try it for my PR #10186

[Jason2866]

Thank you. Exactly what i wanted to know. Will try some ;-) Feedback follows. Will need some days ;-)

[VojtechBartoska]

looks really nice @lucasssvaz!

[P-R-O-C-H-Y]

LGTM

[pedrominatel]

LGTM

[me-no-dev]

@lucasssvaz typo: https://github.com/espressif/arduino-esp32/actions/runs/10736557292/job/29776228500?pr=10221#step:8:25