Feature: graph tool (#169)

* adding graphTool

* fix tool triggering

* update graphTool to provide connected nodes and paths

* update gitmcp

* fix code returning of calling functions

* update tool and tests

* update fetchUsageCodeExamples tool

- Graph exists + function found/not found
- Creation progress tracking and timeout handling
- Background graph creation with API integration
- Input validation and error handling
- Multi-repo independence and stale lock cleanup

* update tests

* Update src/api/tools/index.test.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Guy Korland <gkorland@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 3 people

.env.example

@@ -1,3 +1,18 @@
 XAI_API_KEY=""
 OPENAI_API_KEY=
 DATABASE_URL="postgresql://username:password@host:port/database"
+
+# Code Graph Backend Configuration
+# Copy this to .env and adjust values as needed
+
+# Server Configuration
+CODE_GRAPH_SERVER_URL=http://127.0.0.1
+CODE_GRAPH_SERVER_PORT=5000
+
+# Authentication
+# Token used to authenticate with the code-graph backend server
+CODE_GRAPH_AUTH_TOKEN=secret
+
+# Ignore Patterns
+# Comma-separated list of patterns to ignore during repository analysis
+CODE_GRAPH_IGNORE_PATTERNS=./.github,./build,./node_modules,./.git,./.vscode,./__pycache__,./.pytest_cache

.gitignore

@@ -182,4 +182,7 @@ dist
 
 playwright-results/
 playwright-report/
-test-results/
+test-results/
+src/.DS_Store
+src/api/.DS_Store
+.DS_Store