Organize the load instructions

[ZERICO2005]

I found that the load instruction page https://ezce.github.io/ez80-docs/instructions/load/ seems to be in a random order. I think it would be better to group them based on if they are an 8bit or 24bit load, and if its loading a register/address/constant.

Here is my idea of how it could be organized

# 8 bit
	## load register
		ld reg8D, reg8S
		ld reg8, regih
		ld reg8, regil
		ld regih, reg8
		ld regil, reg8

		ld reg8, imm8
		ld regih, imm8
		ld regil, imm8

	## load pointer
		ld a, (imm24)

		ld a, (reg24)
		ld reg8, (regi + ofs8)

	## store pointer
		ld (imm24), a

		ld (reg24), a
		ld (regi + ofs8), reg8
		ld (regi + ofs8), imm8

# 24 bit
	## load register
		ld sp, hl
		ld sp, regi

		ld reg24, imm24
		ld regi, imm24

	## load pointer
		ld hl, (imm24)
		ld reg24, (imm24)
		ld regi, (imm24)

		ld reg24, (hl)
		ld regi, (hl)
			
		ld reg24, (regi + ofs8)
		ld regi, (ix + ofs8)
		ld regi, (iy + ofs8)

	## store pointer
		ld (imm24), hl
		ld (imm24), reg24
		ld (imm24), regi

		ld (regi + ofs8), reg24
		ld (ix + ofs8), regi
		ld (iy + ofs8), regi 

# memory and interrupts
	ld regir, a
	ld a, regir
	ld a, mb
	ld mb, a

I also now realize that ld reg8D, reg8S contains ld reg8, (HL), so that would probably be moved to the ## load pointer section and etc