chore: add git-cliff configuration

feat(release): implement incremental changelog and versioned release workflow

- Generate changelog from previous release tag to HEAD
- Replace full-history changelog with incremental git-cliff usage
- Add automatic version bump from date-based tag
- Commit and push version updates (package.json and lockfile)
- Refactor workflow order to align changelog, versioning, and build
- Improve Node setup and add version checks
- Introduce cliff.toml configuration for grouped changelog output
- Add generated version.json for runtime version display
- Update footer layout to include dynamic version and release link

Signed-off-by: Alexander Lyall <alex@adcm.uk>

src/generated/version.json

@@ -0,0 +1,4 @@
+{
+  "version": "dev",
+  "url": "#"
+}