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/database/external_releases_test.go

@@ -395,9 +395,9 @@ func TestSecondaryTypesRoundTrip(t *testing.T) {
 	}
 
 	cases := []struct {
-		name     string
-		in       []string
-		want     []string
+		name string
+		in   []string
+		want []string
 	}{
 		{"empty", nil, nil},
 		{"single", []string{"Compilation"}, []string{"Compilation"}},
@@ -406,10 +406,10 @@ func TestSecondaryTypesRoundTrip(t *testing.T) {
 	for _, c := range cases {
 		t.Run(c.name, func(t *testing.T) {
 			r := &ExternalRelease{
-				RGID:          "rgid-" + c.name,
-				ArtistID:      "artist-1",
-				Title:         "Title " + c.name,
-				Type:          "Album",
+				RGID:           "rgid-" + c.name,
+				ArtistID:       "artist-1",
+				Title:          "Title " + c.name,
+				Type:           "Album",
 				SecondaryTypes: c.in,
 			}
 			if err := SaveExternalRelease(db, r); err != nil {