Added support for weaviate vector database

[d-vignesh]

• Added support for Weaviate vector database
• Implemented the functionality of document insertion and incremental insertion.

Tested the changes locally using weaviate cloud instance.

Initial Insertion(Added two files, file1 and file2):

Incremental Insertion(Added two more file, file3 and file4):

Weaviate dashboard(4 objects inserted to the collection):