feat: improve direct model workspace tools

Direct models now use bundled ripgrep for workspace discovery, read files through resumable pages, and edit multiple files with apply_patch. Ask can search and read while Execute retains write access, and fixed total input limits no longer constrain these tools.

Release note: 直连模型现可使用随包 ripgrep 搜索项目、分页读取任意大小的文本，并通过多文件补丁修改代码；设置中的相关能力统一显示为工作区文件和开发工具。

src/main/agent/bundled-runtimes.ts

@@ -3,6 +3,7 @@ import { join } from 'node:path'
 export type BundledRuntimePaths = {
   opencode: string
   opencodeConfig?: string
+  ripgrep: string
   continue: string
   deepseekHarness: string
 }
@@ -15,11 +16,14 @@ export function resolveBundledRuntimePaths(input: {
   resourcesPath: string
   packaged: boolean
   platform?: NodeJS.Platform
+  arch?: NodeJS.Architecture
 }): BundledRuntimePaths {
   const packagedExecutable =
     (input.platform ?? process.platform) === 'win32'
       ? 'opencode.exe'
       : 'opencode'
+  const ripgrepExecutable =
+    (input.platform ?? process.platform) === 'win32' ? 'rg.exe' : 'rg'
   if (input.packaged) {
     return {
       opencode: join(
@@ -33,6 +37,12 @@ export function resolveBundledRuntimePaths(input: {
         'runtimes',
         'opencode-config'
       ),
+      ripgrep: join(
+        input.resourcesPath,
+        'runtimes',
+        'opencode',
+        ripgrepExecutable
+      ),
       continue: join(
         input.resourcesPath,
         'runtimes',
@@ -58,6 +68,14 @@ export function resolveBundledRuntimePaths(input: {
       'bin',
       'opencode.exe'
     ),
+    ripgrep: join(
+      input.appPath,
+      'node_modules',
+      '@vscode',
+      `ripgrep-${input.platform ?? process.platform}-${input.arch ?? process.arch}`,
+      'bin',
+      ripgrepExecutable
+    ),
     continue: join(
       input.appPath,
       'node_modules',