Adds SVS vamana migration examples from HNSW and Flat via notebooks

[nkanu17]

• readme update
• add them to ignore-notebooks.txt
• example notebooks

[rbs333]

Time box for now initial notes:

• Align redis setup with other examples. We want that to be pretty standard. Even if it's not perfect if we do overhaul it'll become a copy/paste job for an AI task. See 01_redisvl as example for the header content and how we start instances in colab
• Colab is the typical default. This example might be an exception given it is a little more advanced but click around with one of those examples to get a feel.
• Use redisvl vectorizers instead of default sentence transformer where possible.
• ran into an error initially because my redis-py version was at 5.3.1 => fixed by upgrading to 6.4.0 please add a note for this at the top too since folks will likely run into an issue

Testing notes:

• installed direct from your branch %pip install -e git+https://github.com/redis/redis-vl-python.git@feat/RAAE-1094-Add-SVS-Vamana-implementation-with-compression-enums-and-validation#egg=redisvl
• imports run successfully
• index create successfully 🙌