feat: add repository context caching system for improved LLM performance

- Implement RepositoryContextManager to maintain complete project context
- Add configuration options for context management (enabled, maxFiles, includeFileContent, etc.)
- Integrate cached context into environment details sent to LLM
- Update system prompt to mention repository context feature
- Add comprehensive test suite for RepositoryContextManager
- Automatically update context on file changes with debouncing
- Support smart file selection based on relevance and patterns
- Extract code patterns (imports, definitions, APIs) for better context understanding

This addresses issue #7735 by providing a complete and updated repository context
for every LLM call, improving accuracy and reducing token consumption.

Author: roomote

packages/types/src/global-settings.ts

@@ -152,6 +152,19 @@ export const globalSettingsSchema = z.object({
 	hasOpenedModeSelector: z.boolean().optional(),
 	lastModeExportPath: z.string().optional(),
 	lastModeImportPath: z.string().optional(),
+
+	// Repository context configuration
+	repositoryContext: z
+		.object({
+			enabled: z.boolean(),
+			maxFileSize: z.number(),
+			maxFiles: z.number(),
+			includeFileContent: z.boolean(),
+			excludePatterns: z.array(z.string()),
+			updateInterval: z.number(),
+			smartSelection: z.boolean(),
+		})
+		.optional(),
 })
 
 export type GlobalSettings = z.infer<typeof globalSettingsSchema>