Remove CI/CD, unify Docker image for Docker Hub and HA add-on

- Remove GitHub Actions workflows (ci.yml, docker.yml, release.yml)
- Remove GoReleaser configuration
- Remove RELEASE.md (replaced by /release_strix skill)
- Add HA options.json support in config.go (reads /data/options.json)
- Add Version field to Config, pass real version to health endpoint
- Change Version from const to var, inject via ldflags at build time
- Add ARG VERSION to Dockerfile for build-time version injection
- Reset webui/package.json version to 0.0.0 (not used functionally)
- Clear probe fields on back navigation in frontend
- Add /release_strix and /release_strix_dev skills

Dockerfile

@@ -4,6 +4,8 @@
 # Stage 1: Builder
 FROM golang:1.24-alpine AS builder
 
+ARG VERSION=dev
+
 WORKDIR /build
 
 # Install build dependencies
@@ -18,7 +20,7 @@ COPY . .
 
 # Build static binary
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=${TARGETARCH} go build \
-    -ldflags="-s -w -X main.Version=docker" \
+    -ldflags="-s -w -X main.Version=${VERSION}" \
     -o strix \
     cmd/strix/main.go