Update CONTRIBUTING.md

Author: cooper-oh

CONTRIBUTING.md

@@ -1,12 +1,30 @@
 # Contributing to the IntelliJ Mise Plugin
 
+Thank you for your interest in contributing to the IntelliJ Mise Plugin!
+
 ## Running other IDEs for testing
+
 As this plugin targets multiple IDEs, when developing you'll want to test against a specific IDE.
 
 You can get a list of available tasks for running the plugin in different IDEs by running the following command:
+
 ```shell
 ./gradlew tasks --group='intellij platform' | grep -E '^run'
 ```
 
+> [!NOTE]
+> In many cases, Intellij Ultimates supports other products via plugins. Maybe you just need `runIntellijIdeaUltimate`
+
+After that, you can run the desired IDE by running the following command:
+
+```shell
+./gradlew prepareSandbox_runIntellijIdeaUltimate # only for the first time
+./gradlew runIntellijIdeaUltimate
+```
+
+> [!NOTE]
+> If you want to use breakpoints for debugging, you can just run the gradle task with IDEA's debug option
+
+
 > [!TIP]
 > If you want to test other version of IDEs, you can change the version field in the [build.gradle.kts](./build.gradle.kts) file.