[ucsim-doc] Add viewport
tree4b508c7bc0dc2e11a072ffff2ff98fdeb57f8584
drwxr-xr-x - sdcc-build
drwxr-xr-x - sdcc-cf
drwxr-xr-x - sdcc-extra
drwxr-xr-x - sdcc-web
drwxr-xr-x - sdcc