feat(parser): add Lua language support with tree-sitter

- Add tree-sitter-lua dependency and register "lua" extension
- Implement symbol extraction for functions, variables, and blocks
- Support import resolution via require() calls
- Extract module exports from return statements and tables

Author: donhardman

Cargo.lock

@@ -59,6 +59,7 @@ tree-sitter-go = "0.23.4"
 tree-sitter-cpp = "0.23.4"
 tree-sitter-bash = "0.25.0"
 tree-sitter-css = "0.23.2"
+tree-sitter-lua = "0.2.0"
 
 uuid = { version = "1.17.0", default-features = false, features = ["v4"] }
 tree-sitter-typescript = "0.23.2"

Cargo.toml

@@ -108,6 +108,8 @@ impl FileUtils {
 			"sh" | "bash" => Some("bash"),
 			// Ruby
 			"rb" => Some("ruby"),
+			// Lua
+			"lua" => Some("lua"),
 			// JSON
 			"json" => Some("json"),
 			// Svelte