feat: add gum helper for choose dialogs

[HikariKnight]

This should help start the process of addressing #148 as it will let us provide basic replacement for gum on systems that lack it with minimal options which in turn lets us shrink down the amount of just commands we have greatly.

Currently it only does choose dialogs, but before merging i want to implement the confirm dialog too.
Return values will be identical to what you would expect from gum so in the most basic use cases it will be a 1:1 drop in, assuming you do not need anything more fancy than the defaults from gum.

[HikariKnight]

Current implementation of ugum supports the choose and confirm verbs
if a command was to be gum choose --cursor="| " "ace of spades" "king of hearts" "5 of diamond" in a just recipe, this can now be replaced with ugum choose --cursor="| " "ace of spades" "king of hearts" "5 of diamond" and ugum will ignore any arguments starting with - and only focus on the the basics, which is providing a choice selection for the user, if ugum detects that the gum binary is present, it will pass all arguments to gum for a more fancy output.
The return values in STDOUT will match what you would expect from using gum if it was installed and it will return the option the user selected.

ugum confirm does the same for confirm dialogs and would be the equivalent to gum confirm.
To change the default prompt just supply one after confirm like ugum confirm "Do you want to build a rocket ship?"
exit code will be 0 if yes, 1 if no. This matches the output from gum

[HikariKnight]

Is there any more changes i need to do to the spec file since it says it failed to build due to the ugum file missing in the log? 🤔

[bsherman]

Seems reasonable.

[HikariKnight]

fzf is now being used as fallback handler if gum is not available and will look like this

if no supported handler is provided in $MENU environment variable and fzf is not available, it will use basic bash to generate the choice selection and the confirm prompts

[KyleGospo]

This looks great!!

Will review when ready.

[HikariKnight]

Ok, as long as no more needed changes get requested, this is now feature complete for initial release.
There were some requests to use fzf after the PR got opened for review.
And since fzf is included in the images, it is a perfect alternative for gum for the images without gum.

The generic bash alternatives are still there in case a user makes a custom image and removes fzf and gum for whatever reason.

Any more changes will be done at a later date with their own PR and if support for more menu handlers is desired then it can be added at a later date by people familiar with the said menu handlers (dmenu, rofi, wofi, rofi-wayland, etc)