Just to make the VC tip a clean release after init syntax thrash

That's it.

Make `nimp dump req` work for many more packages

Also have generated code qualify imports with std/.

Source code clean-ups

See change log and new source for details. Should work the same across the board but now be import-able as a library. This depends upon nothing and nothing depends upon this, though.

Correct a years ago oversight limiting scope

Add task template to work with more client .nimble files even though probably no one but me uses this and now atlas exists..

Silence some warnings

BareExcept, ByteAddres, hint:LineTooLong, hint:Performance.

A few niceties & updates

ANSI SGR colorize repo names. Update existsDir->dirExists. Allow a NIMP_AUTH file, rely on more recent Nim, do nimPreviewSlimSystem compatibility for older Nim, abstract "nim e" into a variable.

Initial public release

There are probably bugs & inadequacies, but I use this every day without issue.