Add Debugging Guide (#1089)

* add debug guide

* add background

* add .gitignore

* Update devtools/dev_sharegpt.yml

Co-authored-by: Wing Lian <wing.lian@gmail.com>

* Update docs/debugging.md

Co-authored-by: Wing Lian <wing.lian@gmail.com>

* simplify example axolotl config

* add additional comments

* add video and TOC

* try jsonc for better md rendering

* style video thumbnail better

* fix footnote

---------

Co-authored-by: Wing Lian <wing.lian@gmail.com>

.gitignore

@@ -1,5 +1,7 @@
 **/axolotl.egg-info
 configs
+last_run_prepared/
+.vscode
 
 # Byte-compiled / optimized / DLL files
 __pycache__/