Correct style, update deps, qualify imports

That's it; Nothing more substantive, but no reason to not release either.

Add built-in type "self" and option to preface -delay samples w/time

As always, git log -p has full details, but as a summary:

- Fix `schedStat` spelling (hitherto undetected since `styleCheck=usages styleCheck=error` does not work unless `hint[Name]=on` is also set).

- Add option to preface each sample in differential-delay mode with time.

- Add a built-in type "self" for the procs display process itself. This can be nice either to suppress it, say in
    `procs display --delay=0.001 --excl=self`
or to emphasize it (e.g. to know which tty ran program in tree formats) with special colorization.

- Update example color config, correctly renumbering side-comment slots and default to struck (& probably bold, unlike zombies).

Add `mUAv` to scrollsy & nicer column headers

More specifically:

Add a flavor of mUsed for `scrollsy` - total-complement to mAvl: `mUAv`

Right align headers for right aligned fields

Rename NI -> NICE; F -> FLAGS; Abbreviation unhelpful

TTY -> TT & 2-column format to save a terminal column in the common case.

Add %b parts per billion, Better exit statuses, Fix a few bugs

In more detail:
- Add new parts per billion CPU time usage as %b; Update configs/cb0/style.auser to use it.
- Give 2 new ways to test for existence of any matches:
- pf -e STUFF || start-it
- pf -ac STUFF >/dev/null || start-it
Fix:
- bug converting delay TimeSpec from seconds to jiffies
- Fix longstanding environ 'e' masks %cPU 'e' bug

Lift signal name number parser out to a cligen/puSig module

..where it should perhaps always have been.

Add PSS from /proc/PID/smaps, better <0 differences, Minor fix

Add proportional set size (PSS) reporting from Linux /proc/PID/smaps file.

Better bug fix for differential reports with differences < 0 (as happens a lot with PSS, actually, due to sharing dynamics). procs d -d1 really does seem nicer than top to me..It's certainly more general.

Correct the nowNs field width.

Add --blanks/-B and %N format for nanosecond real-time

Together this lets you do something like this to monitor a process:

burn-cpu & pd -pBHd1 -D'R<>J' -f "%N %R %< %> %J %a" $!

Or you could replace $! with $(pf firefox), take out the -p to leave colors on, or etc., etc.

Bump to use more portable cligen/posixUt.findAssociated

This is more a hygiene bump since while procs is Linux-only and Linux has always provided /proc/PID/exe , but procs.nim does call that updated API code.

Remove some unneeded copies in mm:arc/orc modes

Also some documentation work and a dep update.

One-command nimble install

The one command install like lc is maybe the most visible thing.

Run a mini-install with mini= nimble install procs to avoid that fanciness provided for more "just try it out" users.

Also in this release:

• working under mm:arc by working around a bug
• a minor new column in default config
• a somewhat faster procs find