add inst week embed and tips

docs/Instruction/images/endmill/climb_vs_conventional.png

docs/Instruction/images/endmill/compression.png

docs/Instruction/images/endmill/img_name.png

docs/Instruction/images/endmill/spiral_3hikaku.jpg

docs/Instruction/images/endmill/spiral_sentan.jpg

docs/Instruction/images/register/ATtiny_x14.gif

docs/Instruction/tips/cnc_tool.md

docs/Instruction/tips/register_bit.md

docs/Instruction/tips_list.md

docs/Instruction/week07.md

docs/Instruction/week08.md