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/cli/cmd/tui/context/theme.tsx

@@ -3,6 +3,7 @@ import path from "path"
 import { createEffect, createMemo, onMount } from "solid-js"
 import { useSync } from "@tui/context/sync"
 import { createSimpleContext } from "./helper"
+import { Glob } from "../../../../util/glob"
 import aura from "./theme/aura.json" with { type: "json" }
 import ayu from "./theme/ayu.json" with { type: "json" }
 import catppuccin from "./theme/catppuccin.json" with { type: "json" }
@@ -391,7 +392,6 @@ export const { use: useTheme, provider: ThemeProvider } = createSimpleContext({
   },
 })
 
-const CUSTOM_THEME_GLOB = new Bun.Glob("themes/*.json")
 async function getCustomThemes() {
   const directories = [
     Global.Path.config,
@@ -405,11 +405,10 @@ async function getCustomThemes() {
 
   const result: Record<string, ThemeJson> = {}
   for (const dir of directories) {
-    for await (const item of CUSTOM_THEME_GLOB.scan({
-      absolute: true,
-      followSymlinks: true,
-      dot: true,
+    for (const item of await Glob.scan("themes/*.json", {
       cwd: dir,
+      absolute: true,
+      dot: true,
     })) {
       const name = path.basename(item, ".json")
       result[name] = await Filesystem.readJson(item)