Feat: Add 'jump_forwards' mapping preset.

[schilkp]

Hi!

I sometimes have multiple snippets that have a similar name, and I would like to cycle through them in the cmp suggestion popup using tab. The default/recommended expand_or_jump_forwards does not allow this:

This adds a jump_forwards mapping "preset", which does not expand on tab:

Let me know if anything needs to be changed or you don't feel this is needed - I am happy to keep having a 'compose' in my config.

Thanks for the great plugin!

[smjonas]

LGTM

[quangnguyen30192]

Great that you find it useful and contribute to it