feat: add include_context option to return source code with results

[PiotrTrzpil]

Summary

This PR adds optional include_context and context_lines parameters to location-returning tools. When enabled, results include surrounding source code lines with the target line marked, reducing the need for separate file reads when Claude Code uses cclsp.

Tools updated:

• find_definition
• find_references
• find_workspace_symbols
• find_implementation
• get_incoming_calls
• get_outgoing_calls

New parameters:

• include_context (boolean, default: false) - Whether to include source code context
• context_lines (number, default: 2) - Lines of context before and after target

Example output with context:

/path/to/file.ts:42:5
  40 | function foo() {
  41 |   const x = 1;
> 42 |   return x;
  43 | }

Motivation

When Claude Code uses cclsp to find definitions or references, it typically needs to make a follow-up Read call to see the actual code at each location. By including context directly in the response, we can eliminate these extra round-trips, making code navigation faster and more efficient.

Test plan

• Added unit tests for getCodeContext() and formatLocationWithContext() in src/utils.test.ts
• All existing tests pass
• TypeScript compiles without errors

🤖 Generated with Claude Code