Add custom model predicates

Add regex support

Add and and or predicates

src/main/java/moe/nea/firmament/mixins/custommodels/ModelOverrideDataHolder.java

@@ -0,0 +1,33 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.mixins.custommodels;
+
+import moe.nea.firmament.features.texturepack.FirmamentModelPredicate;
+import moe.nea.firmament.features.texturepack.ModelOverrideData;
+import net.minecraft.client.render.model.json.ModelOverride;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+
+@Mixin(ModelOverride.class)
+public class ModelOverrideDataHolder implements ModelOverrideData {
+
+    @Unique
+    private FirmamentModelPredicate[] overrides;
+
+    @Nullable
+    @Override
+    public FirmamentModelPredicate[] getFirmamentOverrides() {
+        return overrides;
+    }
+
+    @Override
+    public void setFirmamentOverrides(@NotNull FirmamentModelPredicate[] overrides) {
+        this.overrides = overrides;
+    }
+}