[FIX] Transfer done signal is moved to sate base for make sure avalon read/write is handled properly
[FIX] Handled Response by adding a new state
-- Added new state to handle write operations
-- Bvalid singal generation modified
-- Ravlid and Avalon read modified for proper sync

- Need to Test properly
[FEATURE] upgraded for Modelsim simulation through scripts (Need to Tests)
-- Updaged for Script based simulation
-- Added Memory models will reduce the time for simulation and loading