refactor: get rid of sda, scl overrides, drive sda, scl directly
refactor: use 'H' std_logic state instead of custom pull up type
tests: rename startstop_condition_detector testbench to contain tb
tests: add messages to checks
tests: add pull up sda, scl behavior
tests: split master i2c functions to separata package
feat: add clear_buffer input to tx
tests: add slave testbench
feat: handle ack in rx, tx
feat(tx): remove unnecessary bit index
chore: use process(all) for combinational processes
tests: add startstop condition detector tests, fix behavior
tests: add test for address detector