feat: rename Docker Watcher to Tinyforge

Rebrand the project as Tinyforge to reflect its evolution from a Docker
container watcher into a self-hosted mini CI/deployment platform.

Rename covers: Go module path, Docker labels, DB/config filenames,
JWT issuer, Dockerfile binary, docker-compose, CI workflows, frontend
i18n, README with static sites docs, and all code comments.

internal/staticsite/deno/template.go

@@ -126,7 +126,7 @@ func parseAPIFunctionName(funcName, baseRoute, importPath string) (RouteEntry, b
 }
 
 // routerTemplate is the Deno router entrypoint template.
-var routerTemplate = template.Must(template.New("router").Parse(`// Auto-generated by Docker Watcher — do not edit manually.
+var routerTemplate = template.Must(template.New("router").Parse(`// Auto-generated by Tinyforge — do not edit manually.
 import { serveDir } from "https://deno.land/std/http/file_server.ts";
 
 {{- range .Imports}}