feat: adds cs alias to csharp so it matches the file extension

[emersonbottero]

this will improve syntax when using it inside vitepress and we won't need to specify the language while importing code from cs files.

• Add a test if possible
• Format all commit messages with Conventional Commits

• This PR fixes #

• I have read docs for adding a theme.

• I have read docs for adding a language.
• I have searched around and this is the most up-to-date, actively maintained version of the language grammar.
• I have added a sample file that includes a variety of language syntaxes and succinctly captures the idiosyncrasy of a language. See docs for requirement.

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[brc-dd]

I'm not sure how stuff here works. This was fixed in #323 but it's changes are not there (were reverted by an automated commit b778187). 👀

[emersonbottero]

I'm not sure how stuff here works. This was fixed in #323 but it's changes are not there (were reverted by an automated commit b778187). 👀

Who can fix this... The pr you linked seems to be the correct one to fix those..
Anything I can help with?

[brc-dd]

Maybe create an issue here mentioning that an automated commit removed the code? They probably need to change some code in their bot too.