Add support for goto definition for object members

Author: AJenbo

src/definition/mod.rs

@@ -1,8 +1,16 @@
 /// Goto definition support.
 ///
 /// This module contains the logic for resolving "go to definition" requests,
-/// allowing users to jump from a class/interface/trait/enum name reference
-/// to its definition in the source code.
+/// allowing users to jump from a symbol reference to its definition in the
+/// source code.
 ///
-/// - [`resolve`]: Word extraction, name resolution, and definition location lookup.
+/// Supported symbols:
+///   - **Class-like types**: class, interface, trait, enum references
+///   - **Methods**: `$this->method()`, `self::method()`, `MyClass::method()`, `$var->method()`
+///   - **Properties**: `$this->property`, `$var->property`, `MyClass::$staticProp`
+///   - **Constants**: `self::MY_CONST`, `MyClass::MY_CONST`, `parent::MY_CONST`
+///   - **Chained access**: `$this->prop->method()`
+///
+/// - [`resolve`]: Word extraction, member access detection, name resolution,
+///   and definition location lookup.
 mod resolve;