chore: bump all packages to 0.4.0, fix exports for publish

- All @uncaged/* packages → 0.4.0
- Internal deps: workspace:* → workspace:^ (resolves to ^0.4.0 on publish)
- Fix exports: add 'bun' condition for local dev (src), 'import' for consumers (dist)
- Remove stale 'main: src/index.ts' from 6 packages
- Fix publish.sh topo sort to match workspace:^ prefix

星月 <xingyue@shazhou.work>

scripts/publish.sh

@@ -86,7 +86,7 @@ for name, dirname in name_to_dir.items():
     local_deps = set()
     for section in ('dependencies', 'devDependencies', 'peerDependencies'):
         for dep, ver in data.get(section, {}).items():
-            if dep.startswith('@uncaged/') and dep in name_to_dir and ver == 'workspace:*':
+            if dep.startswith('@uncaged/') and dep in name_to_dir and ver.startswith('workspace:'):
                 local_deps.add(dep)
     deps_graph[name] = local_deps