SparkNLP 1005 implement nomic embeddings

[prabod]

This PR introduces nomic embeddings to Spark NLP

Description

nomic-embed-text-v1 is 8192 context length text encoder that surpasses OpenAI text-embedding-ada-002 and text-embedding-3-small performance on short and long context tasks.

Types of changes

• [x] New feature (non-breaking change which adds functionality)

Checklist:

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING page.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[jtattersall09403]

Hi, has there been any further progress on this PR? Are there any estimated timescales for when it might be completed? Thanks!