feat: add keymaps for actions

[arnevm123]

While using the plugin I found some documentation missing, please let me know if something is not accurate

[arnevm123]

Not sure if I think peek is implemented as "Checkpoint", as this seems to be a similar purpose?
Also if you think the added keymaps are not "Actions" I can put these in another table.
If you think any descriptions are wrong/ you have some suggestions I can change them.
Or feel free to edit them yourself if you find that easier 😄

[AdeAttwood]

Yea this looks good, you are correct about the checkpoint and peek this is inconsistent naming. I think we will park this until #81 is done. I would really love to use the ftplugin/ivy.lua pattern, however I don't think it will work amazing with the external plugin managers we have now.

I think I am just going to have to accept that there are not many of us still using vim packages.

[AdeAttwood]

@arnevm123 after some thought, I am going to get this in and remove "Pending" from the code base to try and make things more consistent.

I also think there is a conversation to be had around this table of actions, they way the actions are defined right now are a little too specific to file finding or another action you are going to a point in a file. I may try to find some time to make this more generic and align the language with the original emacs package.

Thanks again for all the suggestions and contributions ❤️

[arnevm123]

No worries, thank you for this amazing plugin and listening to my suggestions!

When I first saw the plugin I thought it was already really big, as it looks amazing and works like a charm!