docs: Add CSV file with the GDS layer informations and comments

This is from https://docs.google.com/spreadsheets/d/176OcP2h_TT_pDP2-zBLijlgFUP38LVgMQPlDtpLcrsk/edit?ts=5eff8387#gid=459375686

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
3 files changed