doc: add document for profiling and heap snapshot

PR-URL: #46787
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: cola119

doc/api/debugger.md

@@ -202,6 +202,13 @@ debug>
 *`repl`: Open debugger's repl for evaluation in debugging script's context
 *`exec expr`, `p expr`: Execute an expression in debugging script's context and
  print its value
+*`profile`: Start CPU profiling session
+*`profileEnd`: Stop current CPU profiling session
+*`profiles`: List all completed CPU profiling sessions
+*`profiles[n].save(filepath = 'node.cpuprofile')`: Save CPU profiling session
+ to disk as JSON
+*`takeHeapSnapshot(filepath = 'node.heapsnapshot')`: Take a heap snapshot
+ and save to disk as JSON
 
 ### Execution control