[BUG] Bad markdown causing parseList Unable to parse list... shouldn't silently fail

[darthwalsh]

Describe the bug
I had a problem with bad spaces/tabs in my list, causing command "Move list and sublists up" to just silently fail, with no error message.

To Reproduce
Create file with mixed tabs, spaces:

- [ ] A
- [ ] B
 - [ ] Space Indent
	 - [ ] Tab Indent

Put cursor on line B

CMD + SHIFT + UP to execute command "Move list and sublists up"

Expected behavior
If unable to parse list because of unexpected indent, please show an error message.

Screenshots

(Or, see #305 or #352)

Environment (please complete the following information):

• OS: macOS Desktop
• Obsidian Version: v1.3.5
• Plugin Version: 4.7.1

Additional context
This was very confusing! I had a big outliner file, and couldn't figure out why Outliner commands were failing to run.

Eventually I figured out how to open devtools with Outliner debug logging, and googled the issue.

It would have been great if outliner could show an error popup Unable to parse list: expected indent "S", got "T" -- even better if outliner could highlight which line was causing the parse problem?

[csss1234]

Solution #485 (comment)