Fix: Resolve ModLoaderType.LEGACY_FABRIC for Modrinth (HMCL-dev#6434)

Author: KSSJW

HMCL/src/main/java/org/jackhuang/hmcl/ui/versions/DownloadPage.java

@@ -472,6 +472,9 @@ private static final class AddonItem extends StackPane {
                             case QUILT:
                                 content.addTag(i18n("install.installer.quilt"));
                                 break;
+                            case LEGACY_FABRIC:
+                                content.addTag(i18n("install.installer.legacyfabric"));
+                                break;
                         }
                     }
 

HMCLCore/src/main/java/org/jackhuang/hmcl/addon/repository/ModrinthRemoteAddonRepository.java

@@ -420,6 +420,7 @@ public Optional<RemoteAddon.Version> toVersion() {
                     loaders.stream().flatMap(loader -> {
                         if ("fabric".equalsIgnoreCase(loader)) return Stream.of(ModLoaderType.FABRIC);
                         else if ("forge".equalsIgnoreCase(loader)) return Stream.of(ModLoaderType.FORGE);
+                        else if ("legacy-fabric".equalsIgnoreCase(loader)) return Stream.of(ModLoaderType.LEGACY_FABRIC);
                         else if ("neoforge".equalsIgnoreCase(loader)) return Stream.of(ModLoaderType.NEO_FORGE);
                         else if ("quilt".equalsIgnoreCase(loader)) return Stream.of(ModLoaderType.QUILT);
                         else if ("liteloader".equalsIgnoreCase(loader)) return Stream.of(ModLoaderType.LITE_LOADER);