refactor: use external picomatch pattern for bundling

- Add TypeScript type definitions for picomatch in src/external/picomatch.d.ts
- Update import in src/releases/github.ts from 'picomatch' to '../external/picomatch.js'
- Ensure picomatch is properly bundled in dist/external/ directory
- Maintain version 4.0.3 via pnpm override

This change follows the established socket-lib pattern for bundling
external dependencies, ensuring they are included in the distribution
without requiring consumers to install them separately.

Author: jdalton

src/external/picomatch.d.ts

@@ -0,0 +1,90 @@
+/**
+ * Picomatch options for glob pattern matching.
+ */
+export interface PicomatchOptions {
+  /**
+   * When true, the glob will match the basename of the path.
+   * @default false
+   */
+  basename?: boolean
+
+  /**
+   * When true, the glob will match case-insensitively.
+   * @default false
+   */
+  nocase?: boolean
+
+  /**
+   * When true, allow matching dotfiles (files starting with '.').
+   * @default false
+   */
+  dot?: boolean
+
+  /**
+   * Glob patterns to ignore.
+   */
+  ignore?: string | string[]
+
+  /**
+   * When true, a leading '!' will negate the glob.
+   * @default true
+   */
+  negate?: boolean
+
+  /**
+   * When true, match against Windows paths.
+   * Defaults to os.platform() === 'win32'.
+   */
+  windows?: boolean
+
+  /**
+   * When true, convert backslashes to forward slashes in paths.
+   * @default true on Windows
+   */
+  normalize?: boolean
+
+  /**
+   * Function to call on each match result.
+   */
+  onMatch?: (result: unknown) => void
+
+  /**
+   * Function to call on each result.
+   */
+  onResult?: (result: unknown) => void
+
+  /**
+   * Format function for transforming paths.
+   */
+  format?: (input: string) => string
+}
+
+/**
+ * Matcher function returned by picomatch.
+ * Tests if a string matches the glob pattern.
+ */
+export type Matcher = (input: string) => boolean
+
+/**
+ * Creates a matcher function from a glob pattern.
+ * The returned function takes a string to match as its argument.
+ *
+ * @param pattern - Glob pattern to match against
+ * @param options - Picomatch options
+ * @returns Matcher function that tests strings against the pattern
+ *
+ * @example
+ * ```ts
+ * import picomatch from './external/picomatch.js'
+ *
+ * const isMatch = picomatch('*.js')
+ * isMatch('test.js') // true
+ * isMatch('test.ts') // false
+ * ```
+ */
+declare function picomatch(
+  pattern: string | string[],
+  options?: PicomatchOptions,
+): Matcher
+
+export default picomatch

src/releases/github.ts

@@ -5,7 +5,7 @@
 import { chmodSync, existsSync } from 'fs'
 import { readFile, writeFile } from 'fs/promises'
 
-import picomatch from 'picomatch'
+import picomatch from '../external/picomatch.js'
 
 import { safeMkdir } from '../fs.js'
 import { httpDownload, httpRequest } from '../http-request.js'