refactor(aria2c): improve download log filtering and follow up to #34

fix(downloader): handle aria2c error 22 for CivitAI downloads

feat(sdxl): add Illustrious XL to anime models

Fixed error: Couldn't find Stable Diffusion in any of: {possible_sd_paths}

docs: Update README with correct guide links

chore: Add negpip to ad_script_names in config.json

chore: Add loglevel WARNING to webui arguments

Disable remove_old_forge()

Update HelloWorld Lightning Euler a v5 download link

Update versions.json

Update README.md

Add announcement and guides for all notebooks

Fix install_auto1111()

use shell when unlink temp storage

Fix custom configs function and refactor remove_old_config()