Finish the documentation conversion process

[mithro]

• Convert the "directory structure" slide to actual text.
• Convert the "RRAM cell" slide & "Layout vs Schematic" slide to match the same format as the Device Details section in the existing documentation.
• Convert the "Layout vs Schematic" slide to match the same format as the Device and Layout vs Schematic section in the existing documentation.
• Convert the "example designs" slide to actual text.
• Convert the "TechFile for Place and Route" slide to layers.csv and similar form as the Layers Reference section in the existing documentation.
• Convert the "Design Rule Check (DRC): Example" slide to match the same format as the Design Rules - Periphery Rules section in the existing documentation.