Edit: Show warning on files that are too large

[umpox]

closes #2965

Description

This PR:

• Adds a warning alongside large files that are @ mentioned in the Edit input
• Shows open tabs by default in the Edit input, as soon as @ is triggered

Test plan

1. Start an edit input, use @ mention
2. Check open tabs are shown immediately
3. Check a warning appears against a large file

[philipp-spiess]

Noice

[abeatrix]

Works smoothly! Left some comments inline.

I think some of the logics are duplicated and can be shared between chat and edit, we should work on that in a follow-up 😄

[abeatrix]

@umpox i just pushed my changes to this branch if you want to test it out :) #3498

[umpox]

@abeatrix Awesome, thank you.

I noticed a bug where symbol results don't show at all for edit or chat, when using @#. Looking into why 🤔

[abeatrix]

@abeatrix Awesome, thank you.

I noticed a bug where symbol results don't show at all for edit or chat, when using @#. Looking into why 🤔

Ohhh do you think it's fixed in #3503?

[abeatrix]

@abeatrix Awesome, thank you.
I noticed a bug where symbol results don't show at all for edit or chat, when using @#. Looking into why 🤔

Ohhh do you think it's fixed in #3503?

I pulled your branch and it's working for me for both Chat and Edit 👀