…URIs (#2202)

Fixes #2201

## Test plan

Manually tested:

1. Open the Cody sidebar.
2. ... , Open Cody Settings Editor

Verify this opens a file with some curly braces instead of throwing an
exception.

Fixes #2196

## Changes

Conversion of the end of range to offset was buggy.
VSC sometimes sends `-1` as line index. If the start or end position of
the range is outside the document, the corresponding offset should be
set to 0 or the document's text length, respectively.
But in case of the end range we were setting it to `0`.

To avoid that mistake:
* I changed `Position::toOffset` method name to
`Position::toOffsetOrZero` to be very explicit of what it does. It
should not be used for ranges, but sometimes we only have a single
position (like for a text insert).
* I added `Range::toOffsetRange` which returns pair of offsets,
correcting them appropriately depending if position is a start or end

## Test plan

1. Login to Cody with Free/Pro user
2. Create new empty python file called quicksort.py, make sure it's
empty
3. Ask Cody to "create a quicksort function"
4. Click on Apply, make sure code is added to source code file
5. Click on Reject

Edit should be properly rejected and file should be empty again.

## Changes

Finally fixes windows gradle/pnpm build.

Couple of additional deps I had to install manually (but it could be due
to my `node` version or some other setup detail):
`npx install gulp`
`npx install gulp-cli`
`npx install cross-env`
`npx update-browserlist-db@latest` // possibly not needed

Also, windows comandline can be more picky, e.g.
`.\gradlew :runIDE -PplatformRuntimeVersion='2024.1.2'`
(notice '' around a version)

## Test plan

N/A

## Changes

Removes annoying `Alt + Enter` shortcut and unifies both bringing `Edit
Code` prompt and confirming an edit into a single shortcut.

## Test plan

1. Select some code in the editor
2. Hit `Ctrl Enter` to show `Edit Code` prompt
3. Add some instruction, e.g. to add comments
4. Hit `Ctrl Enter` again to confirm the changes and do an edit

## Test plan
1. n/a

Includes a fix for #2197

## Test plan
1. full qa

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Co-authored-by: Piotr Kukielka <pkukielka@virtuslab.com>