feat: improve @ file search for large projects (#8805)

* feat: improve @ file search for large projects

- Increase default file limit from 5,000 to 10,000 (configurable up to 500,000)
- Respect VSCode search settings (useIgnoreFiles, useGlobalIgnoreFiles, useParentIgnoreFiles)
- Add 'maximumIndexedFilesForFileSearch' configuration setting
- Add tests for new functionality

Conservative default of 10k keeps memory usage low while still providing 2x
improvement. Users with large projects can opt-in to higher limits (up to 500k).

This is a simplified alternative to PR #5723 that solves the same problem
without the complexity of caching. Ripgrep is already fast enough for
10k+ files, and the benefit of caching doesn't justify 2,200+ lines of
additional code and maintenance burden.

Fixes #5721

* fix: add missing translations for maximumIndexedFilesForFileSearch setting

* test: improve file-search tests to verify configuration behavior

Author: daniel-lxs

src/package.json

@@ -406,6 +406,13 @@
 					"default": "",
 					"description": "%settings.autoImportSettingsPath.description%"
 				},
+				"roo-cline.maximumIndexedFilesForFileSearch": {
+					"type": "number",
+					"default": 10000,
+					"minimum": 5000,
+					"maximum": 500000,
+					"description": "%settings.maximumIndexedFilesForFileSearch.description%"
+				},
 				"roo-cline.useAgentRules": {
 					"type": "boolean",
 					"default": true,

src/package.nls.ca.json

@@ -39,6 +39,7 @@
 	"settings.customStoragePath.description": "Custom storage path. Leave empty to use the default location. Supports absolute paths (e.g. 'D:\\RooCodeStorage')",
 	"settings.enableCodeActions.description": "Enable Roo Code quick fixes",
 	"settings.autoImportSettingsPath.description": "Path to a RooCode configuration file to automatically import on extension startup. Supports absolute paths and paths relative to the home directory (e.g. '~/Documents/roo-code-settings.json'). Leave empty to disable auto-import.",
+	"settings.maximumIndexedFilesForFileSearch.description": "Maximum number of files to index for the @ file search feature. Higher values provide better search results in large projects but may use more memory. Default: 10,000.",
 	"settings.useAgentRules.description": "Enable loading of AGENTS.md files for agent-specific rules (see https://agent-rules.org/)",
 	"settings.apiRequestTimeout.description": "Maximum time in seconds to wait for API responses (0 = no timeout, 1-3600s, default: 600s). Higher values are recommended for local providers like LM Studio and Ollama that may need more processing time.",
 	"settings.newTaskRequireTodos.description": "Require todos parameter when creating new tasks with the new_task tool",