v0.11.0

feat: add hashed external asset manifest workflow

- rewrite prefixed asset URLs to content-hashed object keys
- support relative asset paths resolved from the page directory
- write static-files.txt as source/key/hash manifest
- reuse manifest entries when ignored assets are unavailable in CI
- warn and leave missing untracked assets unchanged
- add Wrangler upload script for hashed R2 keys
- document local publish and CI build workflow