Add Nodes for Opening and Closing Projects

[Night1099]

Added some more project workflow management to RTX Remix nodes to handle execution flow. Mainly to save VRAM for AI processing that remix is taking up in viewport.

New Features:

• Open Project Node - Opens RTX Remix projects by layer ID

• Get Loaded Project - Gets layer ID of current open project for Open Project node to use later

• Close Project Node - Closes RTX Remix projects

• Get Default Directory Node - Captures the RTX Remix default output directory before closing projects

• Edited Ingest Texture Node - Made Optional Output_folder mandatory, provided by user or Get Default Direcotry Node

• Fixed Path handling compatibility for URLs with spaces when calling toolkit

• Added a PBRify workflow "rtx_remix_pbrify_workflow_LowVRAM" showing this at work and for users with low vram

• Edited normal PBRify workflow to work with new ingest texture changes

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Tested on latest comfyui build

[po-trottier]

Please update:

• README.md: Please add docstring for the new nodes
• CHANGELOG.md: Please add a changelog entry for this change
• pyproject.toml: Please update the version to 1.1.0

Other than that I've added a couple of comments inline.

Lastly, please just run .\repo.bat format to make sure all the changes are formatted properly and SQUASH all your commits into a single commit :)

[po-trottier]

Looks great! Just added a few cleanup comments but LGTM otherwise!

[po-trottier]

With the most recent change you'll need to update both the regular and LowVRAM templates to update the ingestion nodes and provide the output dir since it's now explicitly required :P