docs(readme): add navigation, debugger, and diagnostics tools documentation

Author: shaiku

README.md

@@ -82,6 +82,43 @@
 | `build_cancel` | Cancel a running build |
 | `build_status` | Get current build status |
 
+### 🧭 Navigation Tools
+
+| Tool | Description |
+|------|-------------|
+| `goto_definition` | Navigate to the definition of a symbol |
+| `find_references` | Find all references to a symbol |
+| `symbol_document` | Get all symbols defined in a document |
+| `symbol_workspace` | Search for symbols across the solution |
+
+### 🐛 Debugger Tools
+
+| Tool | Description |
+|------|-------------|
+| `debugger_status` | Get current debugger state |
+| `debugger_launch` | Start debugging (F5) |
+| `debugger_launch_without_debugging` | Start without debugger (Ctrl+F5) |
+| `debugger_continue` | Continue execution (F5) |
+| `debugger_break` | Pause execution (Ctrl+Alt+Break) |
+| `debugger_stop` | Stop debugging (Shift+F5) |
+| `debugger_step_over` | Step over (F10) |
+| `debugger_step_into` | Step into (F11) |
+| `debugger_step_out` | Step out (Shift+F11) |
+| `debugger_add_breakpoint` | Add a breakpoint at a file and line |
+| `debugger_remove_breakpoint` | Remove a breakpoint |
+| `debugger_list_breakpoints` | List all breakpoints |
+| `debugger_get_locals` | Get local variables in current frame |
+| `debugger_get_callstack` | Get the call stack |
+
+### 🔍 Diagnostics Tools
+
+| Tool | Description |
+|------|-------------|
+| `errors_list` | Read build errors, warnings, and messages from the Error List |
+| `output_read` | Read content from an Output window pane |
+| `output_write` | Write a message to an Output window pane |
+| `output_list_panes` | List all available Output window panes |
+
 ## 🛠️ Installation
 
 ### Visual Studio Marketplace