Created InvalidNameChecker

[sushimon]

Motivation and Context

Pylint's invalid-name error explains how a variable name violates conventions but does so using regular expressions. Since beginners are unlikely to know what regular expressions are, this PR aims to "extend" the behaviour of the invalid-name checker by providing more beginner-friendly error messages.

Your Changes

Description:

• Created a new checker.
• Created tests for this new checker.
• Updated the CHANGELOG.md file.
• Updated the documentation to include this new checker.
• Created examples for this new checker.
• Disabled invalid-name in the config file to avoid redundant checks.

Type of change (select all that apply):

• New feature (non-breaking change which adds functionality)

Testing

• Ran the test suite and verified they passed.
• Ran the newly added tests and verified they passed.
• Previewed the CHANGELOG.md and verified the newly added documentation is there.
• Generated the documentation and verified that the newly added section on the checker is there (with the example).

Questions and Comments (if applicable)

• The failing test on GitHub Actions passes locally. The appropriate message gets added properly locally.

Checklist

• I have performed a self-review of my own code.
• I have verified that the CI tests have passed.
• I have reviewed the test coverage changes reported on Coveralls.
• I have added tests for my changes.
• I have updated the CHANGELOG.md file.

[coveralls]

Pull Request Test Coverage Report for Build 5675839692

• 199 of 199 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.3%) to 94.443%

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Totals
Change from base Build 5675300086:	0.3%
Covered Lines:	3263
Relevant Lines:	3455

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💛 - Coveralls