fix: editor split, stop flag in actions, write errors, history on failure, expect panic, string match

- src/main.rs: split VISUAL/EDITOR into prog+args, drop expect panic in reap_timer, propagate write_timer errors, check stop during actions, record history on partial failure, use const for stop msg
- Cargo.toml: add authors/homepage, bump noyalib 0.0.12->0.0.13
- release.yaml: tighten tag glob, fix curl 404 fallback, URI-encode asset name, upgrade upload-artifact v3->v4
- ci.yaml: add cargo cache step
- README.md: sync feature list, fix push to two-step
- RELEASING.md: clarify Cargo.lock regeneration

.gitea/workflows/ci.yaml

@@ -14,6 +14,14 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Cache Cargo registry and build
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            target
+          key: cargo-${{ hashFiles('Cargo.lock') }}
+
       - name: Check formatting
         shell: bash
         run: cargo fmt --check