feat: Implement auto-detection of subexecutor

[pepoluan]

Standards checklist:

• The PR title is descriptive.
• The PR doesn't replicate another PR which is already open.
• I have read the contribution guide and followed all the instructions.
• The code follows the code style guide detailed in the wiki.
• The code is mine or it's from somewhere with an MIT-compatible license.
• The code is efficient, to the best of my ability, and does not waste computer resources.
• The code is stable and I have tested it myself, to the best of my abilities.
• If the code introduces new aliases, I provide a valid use case for all plugin users down below.

Changes:

• Adds a new library, named 00subexecutor.zsh. The 00 part is to ensure that it runs first, because it will set a certain zstyle that is needed by other (patched) libraries.
• Patches several other libraries formerly hard-coded to use sudo, to adapt to whatever subexecuter has been detected in 00subexecutor.zsh
• Adds a new 'global' function called subex that can be used in place of (parameterless) sudo in all plugins, if we ever want to do the heavy-lifting of making all plugins have transparent support for non-sudo subexecutor

Other comments:

This should close #12245

This PR modifies the core parts of OMZ, it is DIFFERENT from #11395, which has been closed anyways.

[pepoluan]

This is taken out from lib/misc.zsh because the definition of the alias now relies completely on what subexecutor is being used.

[pepoluan]

I replaced sudo in the filter with ${_subex}|_|subex for the following reasons:

• The subexecutor is not necessarily sudo now (can be doas, for instance)
• There's an underscore _ alias (previously defined in lib/misc.zsh) that aliases the subexecutor
• There's a new global function subex that also invokes the subexecutor

[pepoluan]

Moved to 00subexecutor.zsh

[pepoluan]

Didn't edit CODEOWNERS file because I'm not sure if that file only applies to plugins, or can also cover a singular file such as lib/00subexecutor.zsh

Edit: Okay just found out how the bot reads the CODEOWNERS file, so I guess I'll assume responsibility for that one file. Commit incoming.

[pepoluan]

One thing I'm not sure is where to document the zstyle :omz subexecutor knob.

(Setting that knob before starting up OMZ will disable the auto-detection mechanism and 'locks' the subexecutor for the session.)

[pepoluan]

Just synced with latest OMZ master. No conflicts.

[pepoluan]

I have decided to document the subexecutor auto-detection (and its related zstyle-based configuration knob) in OMZ's README.md, especially since there are mentions of other possible zstyle-based configuration in this file.

[pepoluan]

1 month since last changes from my part (commit 7ddee97), and so far merging from ohmyzsh:master is no problem, and no conflicts.

So, any blocking issues, @carlosala ?

[carlosala]

Hi @pepoluan! It's on our backlog, and we want to rethink it before merging. We're shaping a new architecture for omz that will arrive at some point, and we really want to make this part of it.
I'll get back to you as soon as we decide something!
Thanks for your work!

[pepoluan]

Hi @pepoluan! It's on our backlog, and we want to rethink it before merging. We're shaping a new architecture for omz that will arrive at some point, and we really want to make this part of it. I'll get back to you as soon as we decide something! Thanks for your work!

Ah okay, fair enough.

In the meantime I will keep updating the branch to sync with master.