feat: add bicep support

[johnnyreilly]

• Add a test if possible (I'm assuming the example serves as a test when adding a language?)
• Format all commit messages with Conventional Commits

• 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.

[octref]

Sorry for the slow response. Rebased on main.

[octref]

Thanks for your contribution!