Bump version to 1.0.20

Fix folder picker hanging on Linux/Wayland (e.g. CachyOS)

Fix SSL ImportError on Linux when running as PyInstaller bundle

Fix false 'Git required' error when git is installed

Show actual git error message instead of generic download failure code

Added sponsor badge

Remove demo video badge from README

Support Windows Store Python for PATH detection

Fix console window flash and UI lag on Windows

Fix RAG file paths, wizard navigation, and PATH detection

Update demo link to badge format in README

Add demo video link to README

Update Kotlin version to 2.3.0 for generated mod projects

Auto-add Python Scripts to PATH during CLI installation

Embed JDK path in Maven wrapper scripts