RenderDoc tasks (#1291)

* First pass on renderdoc support

* Fixes and improvements

* Fix debugging/cleaner code.

* Download from fabric maven

* Fix build

* Revert changes to AbstractRunTask

src/main/java/net/fabricmc/loom/task/RenderDocRunUITask.java

@@ -0,0 +1,51 @@
+/*
+ * This file is part of fabric-loom, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2025 FabricMC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.fabricmc.loom.task;
+
+import java.io.IOException;
+
+import org.gradle.api.DefaultTask;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.tasks.InputFile;
+import org.gradle.api.tasks.TaskAction;
+
+import net.fabricmc.loom.util.Constants;
+
+public abstract class RenderDocRunUITask extends DefaultTask {
+	@InputFile
+	public abstract RegularFileProperty getRenderDocExecutable();
+
+	public RenderDocRunUITask() {
+		setGroup(Constants.TaskGroup.FABRIC);
+	}
+
+	@TaskAction
+	public void run() throws IOException {
+		ProcessBuilder builder = new ProcessBuilder()
+				.command(getRenderDocExecutable().getAsFile().get().getAbsolutePath());
+		builder.start();
+		// Allow to run in the background.
+	}
+}