feat: implement Live/Remix filtering and add CI/CD pipeline

This commit includes:

1. Live/Remix Filtering Feature:
   - Added ignore_live and ignore_remix columns to artist_settings table (migration 010)
   - Updated ArtistSettings struct with IgnoreLive and IgnoreRemix fields
   - Modified SaveArtistSettings and UpdateArtistSettings to handle new fields
   - Extended FilterOptions struct with IgnoreLive and IgnoreRemix
   - Updated ApplyTypeToggles and ApplyTypeTogglesToReleaseGroups to filter Live/Remix types
   - Added toggleIgnoreLive and toggleIgnoreRemix handlers in web layer
   - Updated ArtistData view model and artist.html template with new toggle UI
   - Comprehensive test coverage for all new functionality

2. CI/CD Pipeline with Gitea Actions:
   - Added .gitea/workflows/docker-build.yml for automated Docker builds
   - Workflow triggers on pushes to main/master and tags, plus PRs
   - Runs Go tests before building
   - Builds and pushes multi-architecture Docker images to gitea.mrixs.me
   - Includes caching for faster subsequent builds
   - Proper tagging strategy (branch, semver, SHA)
   - CI-CD-GUIDE.md documentation

3. Cleanup:
   - Removed temporary build artifacts and coverage files

internal/web/server_test.go

@@ -257,9 +257,9 @@ func TestArchive_RendersIgnoredReleases(t *testing.T) {
 	seedArtist(t, db, "a1", "Radiohead", "", true)
 	// An ignored external release.
 	if err := database.SaveExternalRelease(db, &database.ExternalRelease{
-		RGID:     "r-ignored",
-		ArtistID: "a1",
-		Title:    "Ignored Album",
+		RGID:      "r-ignored",
+		ArtistID:  "a1",
+		Title:     "Ignored Album",
 		IsIgnored: true,
 	}); err != nil {
 		t.Fatalf("seed ignored release: %v", err)
@@ -490,10 +490,10 @@ func TestStateChangingEnforcesSameOrigin(t *testing.T) {
 	served := "http://0.0.0.0:8080" // matches the server's Addr()
 
 	tests := []struct {
-		name      string
-		route     string
-		origin    string
-		wantCode  int
+		name     string
+		route    string
+		origin   string
+		wantCode int
 	}{
 		{"same-origin Origin allowed", "/artist/a1/ignore", served, http.StatusSeeOther},
 		{"no Origin header allowed (same-origin form post)", "/artist/a1/ignore", "", http.StatusSeeOther},