refactor: memory table cleanup

[zmalatrax]

Removes unnecessary methods from MemoryTable, makes fields and methods private.

It also refactors the way registers are added to the memory table in From<Vec> for MemoryTable

I'm half convinced of the proposed design to create MemoryTableRow out of Registers, with From<(&Register, bool)> for MemorytTableRow

[tcoratger]

Suggested change

	let memory_rows: Vec<MemoryTableRow> =
	registers.iter().map(|reg| MemoryTableRow::from((reg, false))).collect();
	memory_table.add_rows(memory_rows);
	let memory_rows =
	registers.iter().map(|reg| (reg, false).into()).collect();
	memory_table.add_rows(memory_rows);