Release v1.3_20260712

Changes in this release

• Add dynamic skin loading and resolution helpers (accb50d)
• Apply auto PEP8 aggressive fixes (429d36d)
• fix gestione stream in appcore e server (4c6bbd3)
• fix Lint (579ae36)
• Fix image source for GPLv3 logo in README (53174b7)
• Update GPLv3 logo link in README (7d95df4)
• Update GPLv3 logo in README (805ae29)
• Update GPLv3 logo in README.md (14b70c9)
• fix vix extractor (e1a660c)
• Apply auto PEP8 aggressive fixes (b583835)