"Add documentation for adding Clojure language support"

[bscriver123]

Pull Request Description

Repository URL: [Add repository URL here]

Issue Title: Document how to add new languages

Issue URL: [Add issue URL here]

Issue Description:
The current issue involves adding Clojure (.clj, .cljs, .cljc) support to the aider repo-maps. While there are tree-sitter implementations available for this syntax, the contributor requires guidance on integrating them into the package to prepare a Pull Request effectively. This Pull Request aims to address the lack of documentation and provide a clear, step-by-step guide on how to add new languages to the aider repo-maps.

Proposed Changes:

• Document the process of adding new languages to the aider repo-maps, specifically focusing on integrating tree-sitter implementations for Clojure syntax.
• Provide clear instructions and examples to help contributors like the one raising the issue successfully add support for new languages.

How to Test:

• Follow the documented steps to add Clojure support.
• Verify that the new language is correctly integrated and functioning as expected within the aider repo-maps.

Additional Notes:

Any feedback and suggestions are welcome to refine the documentation and make the process of adding new languages more accessible and intuitive for future contributors.

Please review and provide feedback on this proposed resolution.