pidgin/purple-plugin-pack

Use the meson summary instead of manually building our summary with message

Testing Done:
Ran `ninja reconfigure` and verified the output.

```
purple-plugin-pack 2.8.1dev

libpurple
install directory: /usr/local/lib/purple-2
data directory : /usr/local/share
plugins : autoreply, bash, capsnot, colorize, dewysiwygification, dice, eight_ball, flip,
google, groupmsg, highlight, ignore, irc-more, irchelper, listhandler, ning,
oldlogger, omegle, showoffline, simfix, slashexec, snpp, splitter, sslinfo,
translate, xmppprio

pidgin
install directory: /usr/local/lib/pidgin
data directory : /usr/local/share
plugins : album, blistops, convbadger, difftopic, enhancedhist, gRIM, icon-override, irssi,
lastseen, listlog, mystatusbox, nicksaid, plonkers, schedule, sepandtab,
switchspell, timelog

finch
install directory: /usr/local/lib
data directory : /usr/local/share
plugins :

User defined options
backend : ninja
```

Reviewed at https://reviews.imfreedom.org/r/2408/
album/album.c
album/album-ui.c
bash/bash.c
blistops/blistops.c
capsnot/capsnot.c
colorize/colorize.c
common/gtk_template.c
common/purple_template.c
convbadger/convbadger.c
dewysiwygification/dewysiwygification.c
dice/dice.c
difftopic/difftopic.c
eight_ball/eight_ball.c
enhancedhist/enhancedhist.c
flip/flip.c
google/google.c
gRIM/gRIM.c
groupmsg/groupmsg.c
highlight/highlight.c
icon-override/icon_override.c
irchelper/irchelper.c
irc-more/irc-more.c
irssi/datechange.c
irssi/irssi.c
irssi/lastlog.c
irssi/layout.c
irssi/window.c
lastseen/lastseen.c
listhandler/aim_blt_files.c
listhandler/alias_xml_files.c
listhandler/alias_xml_files.c
listhandler/gen_xml_files.c
listhandler/listhandler.c
listhandler/migrate.c
listhandler/purple_blist_xml.c
listhandler/purple_blist_xml.c
listlog/listlog.c
mystatusbox/mystatusbox.c
nicksaid/nicksaid.c
ning/ning.c
ning/ning_connection.c
oldlogger/oldlogger.c
omegle/om_connection.c
omegle/omegle.c
plonkers/plonkers.c
schedule/pidgin-schedule.c
schedule/schedule.c
sepandtab/sepandtab.c
showoffline/showoffline.c
simfix/simfix.c
slashexec/slashexec.c
snpp/snpp.c
splitter/splitter.c
sslinfo/sslinfo.c
switchspell/switchspell.c
timelog/log-widget.c
timelog/range-widget.c
timelog/timelog.c
timelog/timelog.h
translate/translate.c
xmppprio/xmppprio.c