Languages: support specifying what's included in standardized way

[domenkozar]

This PR introduces a comprehensive overhaul of the language modules, adding standardized development tool support across all languages and introducing several new language modules.

Fixes https://github.com/cachix/devenv/issues/783

{
  languages.X.dev.lsp.enable = false;
  languages.X.dev.debugger.enable = false;
  languages.X.dev.linter.enable = false;
  languages.X.dev.formatter.enable = false;
}

New Languages Added

• Ada - Full support with GNAT compiler and Ada Language Server
• Assembly - Support for x86/ARM assembly with NASM, GAS, and debugging tools
• COBOL - GnuCOBOL compiler with OpenCobolIDE support
• MATLAB - MATLAB runtime and development environment integration
• SQL - Tooling to work with SQL

Enhanced Development Tool Support

All existing language modules now feature a standardized languages.<lang>.dev.enable configuration with:

• Language Servers - LSP support for IDE integration via languages.<lang>.dev.lsp.enable
• Formatters - Code formatting tools specific to each language languages.<lang>.dev.formatter.enable
• Linters - Static analysis and code quality tools languages.<lang>.dev.linter.enable
• Debuggers - Language-specific debugging capabilities using languages.<lang>.dev.debugger.enable

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[domenkozar]

decided to split this up in pieces, first LSP in https://github.com/cachix/devenv/pull/2382