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/config/seed.go

@@ -6,8 +6,8 @@ import (
 	"log/slog"
 	"os"
 
-	"github.com/alexei/docker-watcher/internal/crypto"
-	"github.com/alexei/docker-watcher/internal/store"
+	"github.com/alexei/tinyforge/internal/crypto"
+	"github.com/alexei/tinyforge/internal/store"
 	"github.com/google/uuid"
 )