Update documentation structure and enhance .gitignore

- Added generated index files and report directories to .gitignore to prevent unnecessary tracking of transient files.
- Updated README links to reflect new documentation paths for better navigation.
- Improved documentation organization by ensuring all links point to the correct locations, enhancing user experience and accessibility.

api/vitest.config.ts

@@ -0,0 +1,20 @@
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'json', 'html'],
+      exclude: [
+        'node_modules/',
+        'dist/',
+        '**/*.test.ts',
+        '**/*.spec.ts',
+        '**/types/**',
+      ],
+    },
+  },
+})
+