refacored index add operations

refactored code to use indexStore

1.  Chore: Remove unwanted logs

1) import with updating index entries instead of replacing existing index file
2) atomic replace support for darwin platform

added feature to import/export as fdb data in zip format

1. Fix: got length of cyphertext is less than 0 error on empty file read.

1. Fix: Disable encryption for append bucket as no way to read encrypted data.

fix: exporting index files by filtering with queries 

1. Add: Lazy writer for append bucket

1. Add: Enable lazy writing for normal bucket

added feature to export and import data into fdb

Fix: Index file not created in some cases. Ex. For asset FDB on another drive.

removed unnecessary logs

1. Fix: Failed to get json data from pack on asset update.
2. Fix: Failed to get content-type from meta data.

1. Add: Hash length check to avoid runtime panic

1. Fix: Os specific row id generation.

1. FIx: Normal bucket operations

1. Fix: Decryption failed on read from normal bucket with security enabled. Fixed by passing compression flag to FDBSecParams.

Fix: invalid result in some operations. Changed rs.vlaue check to array length.

1. Fix: "No data found" error check failed. Check error message instead of value.

1. Add: FDB security for normal bucket

1. Fix: "please specify filetype" error on first save. Set Fieldquery only if it is provided.

1. Add: Lock for CRUD operations in pack bucket

1. Fix: "requiredData" not updated in index file

1. Fix: Failed update and upsert media operations due to row name conflict. Chnaged rowId from IndexNameQuery to relative filepath hash.