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/test/i18n.tsx

@@ -176,6 +176,10 @@ const mockMessages: Record<Locale, Record<string, string>> = {
     'codexlens.envField.searchStrategy': 'Search Strategy',
     'codexlens.envField.coarseK': 'Coarse K',
     'codexlens.envField.fineK': 'Fine K',
+    'codexlens.envField.stagedStage2Mode': 'Stage-2 Mode',
+    'codexlens.envField.stagedClusteringStrategy': 'Clustering Strategy',
+    'codexlens.envField.stagedClusteringMinSize': 'Cluster Min Size',
+    'codexlens.envField.enableStagedRerank': 'Enable Rerank',
     'codexlens.envField.useAstGrep': 'Use ast-grep',
     'codexlens.envField.staticGraphEnabled': 'Static Graph',
     'codexlens.envField.staticGraphRelationshipTypes': 'Relationship Types',
@@ -444,6 +448,10 @@ const mockMessages: Record<Locale, Record<string, string>> = {
     'codexlens.envField.searchStrategy': '搜索策略',
     'codexlens.envField.coarseK': '粗筛 K 值',
     'codexlens.envField.fineK': '精筛 K 值',
+    'codexlens.envField.stagedStage2Mode': 'Stage-2 模式',
+    'codexlens.envField.stagedClusteringStrategy': '聚类策略',
+    'codexlens.envField.stagedClusteringMinSize': '最小聚类大小',
+    'codexlens.envField.enableStagedRerank': '启用重排序',
     'codexlens.envField.useAstGrep': '使用 ast-grep',
     'codexlens.envField.staticGraphEnabled': '启用静态图',
     'codexlens.envField.staticGraphRelationshipTypes': '关系类型',