Allow the user to customise the key maps in the completion buffer

[AdeAttwood]

Problem to solve

As mentioned by @arnevm123 in https://github.com/AdeAttwood/ivy.nvim/pull/81#issuecomment-2188204019

Also, should the keymaps for the window be configurable? Most of them seem very intuitive and don't need changing for me, except for maybe next/ next checkpoint or the previous versions.

There are many plugins that already do this, I think we will be able to take inspiration from them and implement something that is familiar to use.

Proposal

Add the keycaps into the config and allow the users to override it to their liking.

Further details

There are many plugins that already do this

Links / References

• https://github.com/hrsh7th/nvim-cmp
• https://github.com/wincent/command-t/blob/e4618dc08695fbf3a1171f12e0fc803ac4a3a19b/doc/command-t.txt#L369