feat: initial Blocky widget for Homepage dashboard

Parses Blocky's /metrics (Prometheus text) endpoint to show:
- Blocking status (Enabled/Disabled)
- Blocked domains count (denylist entries)
- Total queries served
- Cache hit rate %

No REST stats endpoint exists in Blocky, so the proxy handler
fetches and parses the Prometheus text format directly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

INSTALL.md

@@ -0,0 +1,70 @@
+# Installation
+
+These files integrate as a standard service widget into the [Homepage](https://gethomepage.dev) dashboard source.
+Homepage has no plugin system — you need to patch the source and rebuild.
+
+## 1. Copy widget files
+
+```bash
+cp -r src/widgets/blocky /path/to/homepage/src/widgets/
+```
+
+## 2. Register the widget
+
+**`src/widgets/widgets.js`** — add import and export:
+```js
+import blocky from "./blocky/widget";
+// ... existing imports ...
+
+export default {
+  blocky,
+  // ... existing widgets ...
+};
+```
+
+**`src/widgets/components.js`** — add dynamic import:
+```js
+const components = {
+  blocky: dynamic(() => import("./blocky/component")),
+  // ... existing components ...
+};
+```
+
+## 3. Add translations
+
+In `public/locales/en/common.json`, merge the contents of `translations/en.json`
+into the top-level object. Repeat for any other locale files you use.
+
+## 4. Homepage config
+
+```yaml
+# services.yaml
+- Infrastructure:
+    - Pi DNS:
+        href: http://10.0.50.5:4000
+        description: DNS ad-blocker
+        icon: blocky.png
+        widget:
+          type: blocky
+          url: http://10.0.50.5:4000
+```
+
+## What the widget shows
+
+| Field | Source metric |
+|---|---|
+| Status | `blocky_blocking_enabled` (Enabled / Disabled) |
+| Blocked Domains | `blocky_denylist_cache_entries{group="ads"}` |
+| Total Queries | `blocky_cache_hits_total` + `blocky_cache_misses_total` |
+| Cache Hit Rate | hits / (hits + misses) × 100 |
+
+Data is pulled from Blocky's Prometheus `/metrics` endpoint — the only source
+that exposes query counts. The REST `/api/blocking/status` endpoint only returns
+the blocking toggle state.
+
+## Upstream
+
+There is an open feature request at
+https://github.com/gethomepage/homepage/discussions/2732 (currently 8 upvotes —
+Homepage requires 20 before considering a PR). Once it crosses that threshold,
+this widget can be submitted as a PR to the official repo.