[PAUSED] pmm: Add auto_escalate[] logic

[NICHOLAS85]

Allows a pm to set auto_escalate[]. When this var is set its value will be used to populate ${root_user} for other pms. This is useful to mimic autosudoing uis behaviors like yay for other pms.

I tested every command to check whether they needed root permissions or not to function and prepended the command which did. However, this doesn't mean I didn't miss any or miss-categorize so I'll keep checking each commands behavior as I use this pr.
The Bedrock documentation would need to be updated to reflect this new variable of course.

[NICHOLAS85]

Current issues after a day of usage:
Caching package database requires root and does not currently automatically escalate. I believe this was an issue already present in pmm that hadn't made itself apparent yet. yay, the only pm and pmm ui which a user would run without privileges, is affected. Potential solutions can be to not cache when run as user like cache_package_manager_list or to escalate automatically using auto_escalate[]. What do you think?

I believe pmm has some internal logic for the ${unprivileged_user} var which cuts the extra space out from the command preview when it is unpopulated, I need to replicate this behavior for ${root_user}. - Fixed

[NICHOLAS85]

Placed on hold until a per-user infrastructure is developed for pmm/Bedrock as pmm will have to manage non-root per-user package caches as well.