Transformerjs embeddings

[praveen-palanisamy]

This PR adds the ability to use HuggingFace transformers.js models to generate embeddings in the MemReFinder app. It allows the user to use the App in Hybrid mode depending on their preference and device capabilities.

The main changes are:

• Added a dependency on HF transformers.js and a new embedding provider class that uses HF transformers.js models to generate embeddings.
• Added an embeddings factory class that selects the appropriate embedding model based on the app mode.
• Added a hybrid app mode that processes data locally to generate embeddings using HF transformers.js models and sends them to the backend service for retrieval.
• Updated the welcome screen image with the latest app screenshot that shows the app mode selection option.
• Removed old and unused launch configurations and added new ones for debugging the frontend and backend separately.

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Name	Status	Preview	Updated (UTC)
memrefinder	✅ Ready (Inspect)	Visit Preview	Aug 28, 2023 6:22am