Feature/file storage: Binary File Full Functionality

[tom6311tom6311]

Brief

• Implement binary file fetch, delete, modify functionalities
• Implement conversion from row value to byte vector and vice versa

Features:

1. Modify File::fetch_rows, File::delete_rows, File::modify_rows to support table and row level operations on binary files.
2. Extract the logics of conversion between row and byte vectors to BytesCoder
   • BytesCoder::bytes_to_row converts a byte vector to a row of specified TableMeta (schema)
   • BytesCoder::row_to_bytes converts a row of specified TableMeta (schema) to a byte vector
3. Remove dependency on .tsv files. The program can work normally without I/O of .tsv files
   • To run the program without tsv, go to .env and set ENABLE_TSV to false
4. Design test cases for the functionalities above.
5. Revise all the unwrap() in file.rs and bytescoder.rs that might let program crash