Delete all files button

[Robinsane]

Button to delete all ingested files. (+ ability to disable the button in settings.yaml)

When first using pgpt I could've used this myself (now I use Python SDK)
I saw multiple cases where people wanted something similar (issues / Discord).

issue example:
#1559

[Robinsane]

Will look into expanding this PR /w button to delete just 1 file

[Robinsane]

Added code with a button to delete a single file

Not happy yet with this:

• multiple users deleting single file at the same time => problem : only last selected file will be deleted (will not happen often & you can disable button in settings.yaml)
• I'd like to refresh the list of ingested files somehow but can't seem to figure out how

[lalbacore]

Accepting these changes.

[TobiasJu]

Cloned the repo, ran the code.
Thanks for your work!
Found one minor issue. The "Delete all files" button is permanently disabled.

[Robinsane]

@TobiasJu
This was intentional
See settings.yaml

delete_file_button_enabled: true
delete_all_files_button_enabled: false

If most of you agree I'll make both true by default
I was thinking for multiple users you don't want an accidental click to go poof (especially since for now there's no visual feedback that private GPT is doing a huge cleanup)
(the other button seemed fine, since it doesn't do anything in most cases unless a file is selected)

EDIT:
Ivan Martinez: "concurrency is out of scope of the default UI"
=> I guess making the "delete all" button enabled by default makes sense :)

[imartinez]

Included in #1612

(btw, I made both buttons visible by default)