Allow opening projects through Tesseratos

[RiscadoA]

Description

Adds the project plugin, which adds support for the ProjectManager system argument, along with an ImGui window for opening and closing projects + launching them and terminating them.
Also adds an utility class Process to the core to handle multiple processes in a cross-platform way.

There are also some other random fixes or simple methods that I needed to add to other areas in order to make this possible. Looking at the commit history probably gives a better view of what I changed.

I need people with Windows and MacOS to check if this also works in other operating systems

Checklist

• Self-review changes.
• Evaluate impact on the documentation.
• Ensure test coverage. The only part that we could in theory could (easily) test of this is the cross-platform multi process utilities I added, but sadly doctest doesn't handle multi process stuff well at all.
• Write new samples. You can test it by opening tesseratos, opening the Project window, setting a project folder and a binary/executable path, and launching it. Then you can use the debugger tool to step, run or terminate the game.
• Add entry to the changelog's unreleased section.

[github-actions]

PR Preview Action v1.4.8
🚀 Deployed preview to https://GameDevTecnico.github.io/cubos/preview/pr-1329/
on branch gh-pages at 2024-10-13 13:37 UTC

[github-actions]

⚠️ Clang-Tidy found issue(s) with the introduced code (1/1)

[codecov]

Codecov Report

Attention: Patch coverage is 12.50000% with 91 lines in your changes missing coverage. Please review.

Project coverage is 40.19%. Comparing base (ff78548) to head (8d18503).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
core/src/thread/process.cpp	0.00%	66 Missing ⚠️
engine/src/assets/bridges/file.cpp	0.00%	14 Missing ⚠️
engine/src/assets/assets.cpp	0.00%	10 Missing ⚠️
core/include/cubos/core/thread/process.hpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1329      +/-   ##
==========================================
- Coverage   40.31%   40.19%   -0.12%     
==========================================
  Files         435      437       +2     
  Lines       30908    31003      +95     
==========================================
+ Hits        12461    12463       +2     
- Misses      18447    18540      +93     

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[cubos-bot]

@kuukitenshi will only be able to review this PR in 3 days.

[kuukitenshi]

It all works on Windows ✨
Aside from that, I didn't find any issues or bugs. The code LGTM!

[diogomsmiranda]

Manually Tested for macOS and works!

Why the choice to call it "Update" and not "Step"?

We should later add a more interactive way to add the project path and binary path. Like a File Explorer type thing.

Code LGTM.

[RiscadoA]

Manually Tested for macOS and works!

Why the choice to call it "Update" and not "Step"?

We should later add a more interactive way to add the project path and binary path. Like a File Explorer type thing.

Code LGTM.

Ty for the review!
I used 'update' in order to be consistent with 'update' systems, but yeah, probably changing it to 'step' is more readable.
I'll change the whole UI in the next PR anyway so I'll be leaving it like this for now.
Also, @Scarface1809 has almost finished the file selector tool, so we'll be able to do that on the next version 👀