Adds various useful things to the repl inspired by ipynb and the julia vscode extension which can be best seen with this video:

https://github.com/user-attachments/assets/6589715e-3783-456c-8f4b-e2d5a1c4090d

To summarize:

Inline outputs

Added small, single-line outputs displayed inline at the end of the code line instead of in a separate block. This provides a cleaner, more compact view for simple results like numbers or short strings. This occurs for execution views who only output a single mimetype/plain OR output nothing, otherwise the default behavior of creating a block will occur.

It looks like this:

or with a Output

This was inspired by julia vscode extension, but now it can be used with any replanguage! Hooray!

It saves lots of space compared to the ugly and distracting:

Gutters and execution numbers

Added gutters + execution number to display exactly what was executed. The gutter highlighting is useful for when selecting multiple cells manually to run, but you dont remember which ones

Ran at different times:

Ran together:

The execution number is useful in the same way that a normal jupyter notebook execution number is useful.

If a gutter-region does not have a block assigned to it, when you edit the text in the gutter region, the gutter will disappear, which is useful for telling when you have modified your code, but does not delete useful experiment results in blocks:

Skip empty line

This is a minor fix which is intended to make lab workflow less tedious. Currently when you execute on an empty line (which might be there for formatting purposes) nothing will occur. This PR adds the ability to, when executing from an empty line, skip ahead the range of inclusion until you reach actual code, and then execute.

Before:

code //run execute
//empty space, so you have to move your cursor down or use arrow key
code //run execute
code //run execute

After:

code //run execute
//empty space, you can now run execute on it and it will include the next line of code
//empty space
code //automatically executed
code //run execute

Currently the only piece of tested code is related to this, i still have to write tests for the gutter annotation api i added and all of the gutter + inline related code. Also still have to add more config for this stuff.

@rgbkrk would appreciate a review :D

Closes #22678

Release Notes:

• repl: Added an inline display of execution results (as opposed to the large execution view) for simple REPL cells
• repl: Improved how execution of empty lines are handled
• repl: Added gutter execution display