Add Chromium blueprint with Docker Compose and configuration files

- Introduced Docker Compose setup for Chromium service, including environment variables and volume configuration.
- Added logo for Chromium.
- Created template.toml for Chromium with default variables for configuration.

blueprints/chromium/docker-compose.yml

@@ -0,0 +1,16 @@
+version: "3"
+
+services:
+  chromium:
+    image: lscr.io/linuxserver/chromium:5f5dd27e-ls102
+    ports:
+      - "3000"
+    environment:
+      - PUID=1000
+      - PGID=1000
+      - TZ=UTC
+    volumes:
+      - config:/config
+
+volumes:
+  config: