feat(docs): Add search and get item tools

Author: Afirium

README.md

@@ -29,6 +29,8 @@ Add to your MCP configuration:
 
 - **`list_builtin_functions`** - Lists all available Zig builtin functions. Builtin functions are provided by the compiler and are prefixed with '@'. The comptime keyword on a parameter means that the parameter must be known at compile time. Use this to discover what functions are available, then use 'get_builtin_function' to get detailed documentation.
 - **`get_builtin_function`** - Search for Zig builtin functions by name and get their documentation, signatures, and usage information. Returns all matching functions ranked by relevance.
+- **`search_std_lib`** - Search the Zig standard library for declarations by name. Returns a list of matching items with their fully qualified names. Use this to discover available types, functions, and constants in the standard library.
+- **`get_std_lib_item`** - Get detailed documentation for a specific standard library item by its fully qualified name (e.g., "std.ArrayList.init"). Returns comprehensive documentation including function signatures, parameters, errors, examples, and source code. Set `get_source_file: true` to retrieve the entire source file where the item is implemented.
 
 ## Commands