refactor: migrate from Bun.Glob to npm glob package

Replace Bun.Glob usage with a new Glob utility wrapper around the npm 'glob' package.
This moves us off Bun-specific APIs toward standard Node.js compatible solutions.

Changes:
- Add new src/util/glob.ts utility module with scan(), scanSync(), and match()
- Default include option is 'file' (only returns files, not directories)
- Add symlink option (default: false) to control symlink following
- Migrate all 12 files using Bun.Glob to use the new Glob utility
- Add comprehensive tests for the glob utility

Breaking changes:
- Removed support for include: 'dir' option (use include: 'all' and filter manually)
- symlink now defaults to false (was true in most Bun.Glob usages)

Files migrated:
- src/util/log.ts
- src/util/filesystem.ts
- src/tool/truncation.ts
- src/session/instruction.ts
- src/storage/json-migration.ts
- src/storage/storage.ts
- src/project/project.ts
- src/cli/cmd/tui/context/theme.tsx
- src/config/config.ts
- src/tool/registry.ts
- src/skill/skill.ts
- src/file/ignore.ts

packages/opencode/src/project/project.ts

@@ -13,6 +13,7 @@ import { iife } from "@/util/iife"
 import { GlobalBus } from "@/bus/global"
 import { existsSync } from "fs"
 import { git } from "../util/git"
+import { Glob } from "../util/glob"
 
 export namespace Project {
   const log = Log.create({ service: "project" })
@@ -262,16 +263,11 @@ export namespace Project {
     if (input.vcs !== "git") return
     if (input.icon?.override) return
     if (input.icon?.url) return
-    const glob = new Bun.Glob("**/{favicon}.{ico,png,svg,jpg,jpeg,webp}")
-    const matches = await Array.fromAsync(
-      glob.scan({
-        cwd: input.worktree,
-        absolute: true,
-        onlyFiles: true,
-        followSymlinks: false,
-        dot: false,
-      }),
-    )
+    const matches = await Glob.scan("**/{favicon}.{ico,png,svg,jpg,jpeg,webp}", {
+      cwd: input.worktree,
+      absolute: true,
+      include: "file",
+    })
     const shortest = matches.sort((a, b) => a.length - b.length)[0]
     if (!shortest) return
     const buffer = await Filesystem.readBytes(shortest)