feat: Add templates for epics, product brief, and requirements PRD

- Introduced a comprehensive template for generating epics and stories, including an index and individual epic files.
- Created a product brief template to outline product vision, problem statements, and target users.
- Developed a requirements PRD template to structure functional and non-functional requirements, including traceability and prioritization.
- Implemented ast-grep processors for JavaScript and TypeScript to extract relationships such as imports and inheritance.
- Added corresponding patterns for JavaScript and TypeScript to support relationship extraction.
- Established comparison tests to validate the accuracy of relationship extraction between tree-sitter and ast-grep methods.

ccw/frontend/src/components/codexlens/envVarSchema.ts

@@ -280,7 +280,7 @@ export const envVarGroupsSchema: EnvVarGroupsSchema = {
         key: 'CODEXLENS_CASCADE_STRATEGY',
         labelKey: 'codexlens.envField.searchStrategy',
         type: 'select',
-        options: ['binary', 'hybrid', 'binary_rerank', 'dense_rerank'],
+        options: ['binary', 'hybrid', 'binary_rerank', 'dense_rerank', 'staged'],
         default: 'dense_rerank',
         settingsPath: 'cascade.strategy',
       },
@@ -304,6 +304,43 @@ export const envVarGroupsSchema: EnvVarGroupsSchema = {
         min: 1,
         max: 100,
       },
+      CODEXLENS_STAGED_STAGE2_MODE: {
+        key: 'CODEXLENS_STAGED_STAGE2_MODE',
+        labelKey: 'codexlens.envField.stagedStage2Mode',
+        type: 'select',
+        options: ['precomputed', 'realtime', 'static_global_graph'],
+        default: 'precomputed',
+        settingsPath: 'staged.stage2_mode',
+        showWhen: (env) => env['CODEXLENS_CASCADE_STRATEGY'] === 'staged',
+      },
+      CODEXLENS_STAGED_CLUSTERING_STRATEGY: {
+        key: 'CODEXLENS_STAGED_CLUSTERING_STRATEGY',
+        labelKey: 'codexlens.envField.stagedClusteringStrategy',
+        type: 'select',
+        options: ['auto', 'hdbscan', 'dbscan', 'frequency', 'noop', 'score', 'dir_rr', 'path'],
+        default: 'auto',
+        settingsPath: 'staged.clustering_strategy',
+        showWhen: (env) => env['CODEXLENS_CASCADE_STRATEGY'] === 'staged',
+      },
+      CODEXLENS_STAGED_CLUSTERING_MIN_SIZE: {
+        key: 'CODEXLENS_STAGED_CLUSTERING_MIN_SIZE',
+        labelKey: 'codexlens.envField.stagedClusteringMinSize',
+        type: 'number',
+        placeholder: '3',
+        default: '3',
+        settingsPath: 'staged.clustering_min_size',
+        min: 1,
+        max: 50,
+        showWhen: (env) => env['CODEXLENS_CASCADE_STRATEGY'] === 'staged',
+      },
+      CODEXLENS_ENABLE_STAGED_RERANK: {
+        key: 'CODEXLENS_ENABLE_STAGED_RERANK',
+        labelKey: 'codexlens.envField.enableStagedRerank',
+        type: 'checkbox',
+        default: 'true',
+        settingsPath: 'staged.enable_rerank',
+        showWhen: (env) => env['CODEXLENS_CASCADE_STRATEGY'] === 'staged',
+      },
     },
   },
   indexing: {