nwb4edu/nwb4edu.github.io: v2.0.0

Changes since v1.1.0 Migrated off DandiHub (retiring) to Colab and Binder as the supported launch options Fixed Lesson 1 streaming to use remfile instead of the Dandihub-only ros3 driver, matching the pattern already used in Lesson 2 Replaced the broken nwbwidgets interactive viewer (incompatible with current pynwb) with a Neurosift-based walkthrough Added a Colab-compatible git-clone cell where notebooks depend on sibling files not present in a fresh Colab runtime Wired up a Binder launch button (binderhub_url, runtime.txt pinning Python 3.11) alongside the existing Colab button Rewrote setup/usage docs (Using This Book, For Educators, Setup, landing page, README) to reflect the new Colab/Binder workflow Bumped the dandi version floor to 0.74.0 (was 0.45.1, which let people install a client too old for the DANDI server) and removed an unreferenced leftover requirements file pinning it exactly Added Colab setup for the AllenSDK-based lessons (Lesson 3 and 4): installs a patched AllenSDK build compatible with modern numpy/pandas and mounts the Allen Brain Observatory data via s3fs