add `scripts` folder explanation to the repository structure
add `scripts` folder explanation to the repository structure

Signed-off-by: Pierre GOUTAGNY <8cf9d25b8716baf608aae819111978dbb3dbe3bd@gmail.com>

epatpol/theia-1,lmcgupe/theia,epatpol/theia-1,epatpol/theia-1,hexa00/theia,hexa00/theia,lmcgupe/theia