Ability to run specific code block

[dlvhdr]

Is your feature request related to a problem? Please describe.
If I have more than 1 code block in a slide and I press C-e, then all of them run at once.

Describe the solution you'd like
Ability to trigger a specific code block.
Something like the jupiter notebooks in vscode.
Maybe a <C-e>+<the number of the code block>

Describe alternatives you've considered
Separating code blocks into different slides.

[maaslalani]

Hey, this is a great idea! Thank you for making this issue!

[ycombinator]

👋 @dlvhdr and @maaslalani, I took a stab at implementing this feature request here: #192. Please take a look and let me know what you think. Thanks!