refactor: rename project videnc-vibe -> av1dae

Rename the Go module, the cmd/ entrypoint dir, the binary, the default config
dir (~/.config/av1dae/), the Docker image/compose service, and all docs and
the dashboard wordmark. No behavioral change — import paths and identifiers
only.

internal/server/server.go

@@ -8,9 +8,9 @@ import (
 	"net/http"
 	"path/filepath"
 
-	"videnc-vibe/internal/logger"
-	"videnc-vibe/internal/status"
-	"videnc-vibe/internal/watcher"
+	"av1dae/internal/logger"
+	"av1dae/internal/status"
+	"av1dae/internal/watcher"
 )
 
 //go:embed index.html