Add DoW)nload and load option

[Sashank999]

It should be useful for users who do not need packages to load on startup. Such packages can be development packages such as compiletc, libX11-dev, etc.

[rarost]

I was looking around the Tinycore github repo and came
across this change request from Sashank999:
I believe his change is incorrect and won't work.

He proposes adding a "Download + Load" option to tce-ab just
like the Apps GUI has.
The code he adds looks like this:
W|w) tce-load -w -l "$EXTN" ;;
It should be this:
W|w) tce-load -w -i -l "$EXTN" ;;

I've confirmed this by checking how the Apps GUI does it.

I also executed his command under TC10-x86 and TC14-x86_64
to confirm it does not work.

The menu item he added looks like this:
DoW)nload-and-load
Since only W is used for this selection, and D is used elsewhere, it
should be:
doW)nload-and-load

Or maybe it should be:
doW)nload + load
to more closely match the Apps GUI menu option.