refactor: use GDRE for self setup (#533)

* refactor: 🚧 WIP: use GDRE

* refactor: ♻️ added new --embed param

* refactor: ♻️ added GDRE download step

Moved the setup to a setup scene. This setup scene is loaded by the `--script`.

* Revert "refactor: ♻️ added GDRE download step"

This reverts commit 95ce66c.

* refactor: ♻️ `--headless`

* chore: 🔥 remove pck explorer license

v6.3.0 (#528)

# Minor Release v6.3.0

Minor update to fix issues with script extension sorting, as well as
potential issues with translations, configurations, and user profiles.

## Key PRs
- #357
- #358
- #520
- #352

## Change Log

### New Features

- #352
- #358

### Fixes
- #357
- #520 
- #522 
- #523
- #524

### Refactors
- #521
- #526

### Tests
- #360 

### Miscellaneous
- #525
- #527
- #529

Merge pull request #329 from GodotModding/development

v6.2.0

Merge - v6.1.0

This update addresses a performance issue related to the new script extension sorting introduced in v6.0.0. It also includes a refactor of the *mod_main.gd* initialization to no longer require the `modLoader` parameter in the `_init()` function.

Merge - v6.0.2

Merge - v6.0.1

v6.0.1

Merge pull request #123 from GodotModding/__develop

v5.0.1

Merge pull request #70 from Qubus0/fix_log_ignoring

fix log-ignore flag

Merge pull request #64 from ithinkandicode/fix-manifest

Minor fixes to `manifest`