feat: 工具层及 mcp 大重构 (#252)

* feat: 第一版大重构

* fix: 修复类型问题

* chore: 更新版本到 1.3.2

* Add brave as alternative WebSearchTool

* fix: 修正顺序

* fix: 修复对穷鬼模式的 auto dream 和 session memory 越过

* feat: 穷鬼模式去除 session-summary

* feat: 创建 builtin-tools 包，搬运所有工具实现

将 src/tools/ 下的全部 60 个工具目录迁移至 packages/builtin-tools/src/tools/，
内部导入路径已更新为 src/ alias 模式。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: 更新 src/ 中所有工具引用至 builtin-tools 包，删除 src/tools/

- src/tools.ts 及 178 个 src/ 文件的 import 路径从 ./tools/ 改为 builtin-tools/tools/
- 删除 src/tools/ 整个目录（已迁移至 packages/builtin-tools/）

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore: 添加 builtin-tools 路径别名至 tsconfig，更新 bun.lock

- tsconfig.json 新增 builtin-tools/* 和 builtin-tools 路径映射
- 新增 packages/builtin-tools/src 至 include

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: 为 builtin-tools、mcp-client、agent-tools 添加 @claude-code-best 作用域前缀

所有包名及 import 路径统一添加 @claude-code-best/ 前缀：
- builtin-tools → @claude-code-best/builtin-tools
- mcp-client → @claude-code-best/mcp-client
- agent-tools → @claude-code-best/agent-tools

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: 修复 node 环境没有 bun 的问题

---------

Co-authored-by: Eric-Guo <eric.guocz@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/builtin-tools/src/tools/WorkflowTool/createWorkflowCommand.ts

@@ -0,0 +1,41 @@
+import { readdir } from 'fs/promises'
+import { join, parse } from 'path'
+import type { Command } from 'src/types/command.js'
+import { WORKFLOW_DIR_NAME, WORKFLOW_FILE_EXTENSIONS } from './constants.js'
+
+/**
+ * Scans .claude/workflows/ directory and creates Command objects for each workflow file.
+ * Each workflow file becomes a slash command (e.g. /workflow-name).
+ */
+export async function getWorkflowCommands(cwd: string): Promise<Command[]> {
+  const workflowDir = join(cwd, WORKFLOW_DIR_NAME)
+  let files: string[]
+  try {
+    files = await readdir(workflowDir)
+  } catch {
+    return []
+  }
+
+  const workflowFiles = files.filter((f) => {
+    const ext = parse(f).ext.toLowerCase()
+    return WORKFLOW_FILE_EXTENSIONS.includes(ext)
+  })
+
+  return workflowFiles.map((file) => {
+    const name = parse(file).name
+    return {
+      type: 'prompt' as const,
+      name,
+      description: `Run workflow: ${name}`,
+      kind: 'workflow' as const,
+      source: 'builtin' as const,
+      progressMessage: `Running workflow ${name}...`,
+      contentLength: 0,
+      async getPromptForCommand(args, _context) {
+        const { readFile } = await import('fs/promises')
+        const content = await readFile(join(workflowDir, file), 'utf-8')
+        return [{ type: 'text' as const, text: `Execute this workflow:\n\n${content}${args ? `\n\nArguments: ${args}` : ''}` }]
+      },
+    } satisfies Command
+  })
+}