Remove Colab badge from README

Remove Gradio/Colab demo (model compatibility issues)

Switch to Qwen2.5-3B-Instruct (stable transformers, ungated, proven on Colab)

Add Open WebUI pipeline example (filter)

Force --upgrade transformers from source for Qwen3.5 on Colab

Fix: trust_remote_code=True for Qwen3.5, drop git+ transformers

Install transformers from source for Qwen3.5 support

Switch from Gemma-3-4B (gated) to Qwen3.5-4B (ungated, vision)

Fix Colab notebook JSON

Add Open in Colab button + one-click demo notebook

Add interactive Gradio demo (Colab/T4 ready)

Add logo to README

Initial release: Mimir v1.0.0 — The Ultimate Memory Architecture