Feat: file management with Profile Cloud

[kkerti]

• Create interface for module file system access for save and upload
• Figure out if nested folder structure should be followed during upload / download
• Evaluate performance impact of adding 100kb characters to Profiles
• Extend the Profiles with files, make it backwards compatible
• UI for showing files on Profiles
• Figure out upload target
• Files have extensions (TOML, lua, plain text)

[kkerti]

Undecided and don't know yet how this feature set evolves, so no support for:

• recursive folder and file reading from module
• recursive file upload to module based on original folders

[kkerti]

New field files added to profiles in Profile Cloud project. We should implement a metadata loader and a full profile loader later on, to improve performance and avoid excessive network operations where we query possibly large files.

The intech.studio/workflows page also queries the profiles, so we must be mindful about the files field exposure.
The profile-cloud firebase functions fetch only select files!