feat: DH-22990: improve clear command behaviour in console input

[dsmmcken]

Typing clear/cls in the console was unreliable — Monaco autocomplete would hijack Enter with a fuzzy match instead of running the command. This makes clearing the console reliable and discoverable.

• a single enter now always runs clear/cls even with the suggest widget open
• clear/cls now show in autocomplete (without suppressing word-based suggestions).
• added "Clear" to the console overflow menu
• added cmd/ctrl+l shortcut (updates live when rebound in settings), replacing previous shortcut that was supposed to clear the input but didn't actually do anything because monaco ate it

Not tested on mac. Please test.

Not sure how much gets reused in enterprise of this.

[codecov]

Codecov Report

❌ Patch coverage is 26.47059% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 50.86%. Comparing base (0c7d87c) to head (a0df86a).

Files with missing lines	Patch %	Lines
packages/console/src/ConsoleInput.tsx	36.84%	12 Missing ⚠️
packages/console/src/monaco/MonacoProviders.tsx	0.00%	7 Missing ⚠️
packages/console/src/Console.tsx	25.00%	3 Missing ⚠️
packages/console/src/ClearCommands.ts	33.33%	2 Missing ⚠️
packages/console/src/monaco/MonacoUtils.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2709      +/-   ##
==========================================
- Coverage   51.10%   50.86%   -0.25%     
==========================================
  Files         793      794       +1     
  Lines       45204    45228      +24     
  Branches    11703    11510     -193     
==========================================
- Hits        23103    23003     -100     
- Misses      22055    22206     +151     
+ Partials       46       19      -27     

Flag	Coverage Δ
unit	50.86% <26.47%> (-0.25%)	⬇️

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[mofojed]

@dsmmcken not sure this is the "right" fix. As I commented on the ticket, native Python REPL in Python just sends the command when you press Enter: https://deephaven.atlassian.net/browse/DH-22990?focusedCommentId=73600
You press Tab to autocomplete.
We should probably do the same, as it's annoying to hit Esc then Enter to just enter stuff.

[mofojed]

The registered suggestions don't appear.

I really don't like this change. It's unexpected behaviour - if I have a variable named clear_color or cls_name, and then type cls and press "Enter", it will just clear my console instead of picking that variable name (which is different behaviour than before, and different behaviour than if you had typed literally anything else).

As mentioned, I really think we should just take "Enter" to run the current command, "Tab" to take the suggestion, as other Python REPLs do.
OR correctly add the clear and cls as commands in the autosuggestion, so you need to press Enter to get the suggestion, then Enter again to send it.

Note also looked at Chrome console and Firefox Console.
Chrome console just runs the command on Enter. It doesn't autohighlight the first suggestion, and shows tab in it to get the suggestion:

If you press Down on the keyboard, then it highlights it:

Firefox shows the item highlighted, and when you press Enter, it selects that item.

[mofojed]

This doesn't seem to work. I think it just most specific completion provider available, as I just see the regular suggestions. If I comment out the other registration (e.g. in MonacoProviders), I then see these suggestions.