feat: Add help command

Author: Jan Krems

lib/node-inspect.js

@@ -513,6 +513,40 @@ function createCommandContext(inspector) {
   }
 
   const ctx = {
+    get help() {
+      const commands = [
+        [
+          'run (r)',
+          'cont (c)',
+          'next (n)',
+          'step (s)',
+          'out (o)',
+          'backtrace (bt)',
+          'setBreakpoint (sb)',
+          'clearBreakpoint (cb)',
+        ],
+        [
+          'watch',
+          'unwatch',
+          'watchers',
+          'repl',
+          'exec',
+          'restart',
+          'kill',
+          'list',
+          'scripts',
+          'breakOnException',
+          'breakpoints',
+          'version',
+        ],
+      ];
+
+      const commandList = commands.map((group) => group.join(', ')).join(',\n');
+      const helpMessage = `Commands: ${commandList}`;
+
+      print(helpMessage);
+    },
+
     debugEval(code) {
       // Repl asked for scope variables
       if (code === '.scope') {