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/metadata/metadata.go

@@ -12,8 +12,8 @@ import (
 	"strings"
 	"time"
 
-	"videnc-vibe/internal/logger"
-	"videnc-vibe/pkg/types"
+	"av1dae/internal/logger"
+	"av1dae/pkg/types"
 )
 
 const (