fix(terminal): use detected shell for script execution

- Replace hardcoded "bash" with the first detected shell from `ShellUtil.detectShells()`.
- Downgrade `gradleIntelliJPlugin` from 2.2.1 to 2.1.0 in `libs.versions.toml`.

Author: phodal

exts/ext-terminal/src/main/kotlin/cc/unitmesh/terminal/sketch/TerminalLangSketchProvider.kt

@@ -162,7 +162,7 @@ class TerminalLangSketchProvider : LanguageSketchProvider {
     fun executeShellScriptOnClick(project: Project, content: String): MouseAdapter = object : MouseAdapter() {
         override fun mouseClicked(e: MouseEvent?) {
             val processBuilder = ProcessBuilder()
-            processBuilder.command("bash", "-c", content)
+            processBuilder.command(ShellUtil.detectShells().first(), "-c", content)
             processBuilder.directory(File(project.basePath!!))
 
             try {

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 dokka = "1.9.10"
 kotlin = "2.1.0"
 changelog = "2.2.1"
-gradleIntelliJPlugin = "2.2.1"
+gradleIntelliJPlugin = "2.1.0"
 qodana = "0.1.13"
 kover = "0.7.5"