[Automation] Use *Magic* to automatically label PRs

[ShootingKing-AM]

Since > 65% Labels can be automatically assigned to PRs w/o mainterner's intervention, this PR implements github-labeler action to assign labels to PRs automatically for better organization.

Label	File filter
ambuild	**/*AMBuildScript* **/*AMBuilder*
amtl	-
assembly	-
bug	-
compatibility	-
compiler	compiler/**/*
core	amxmodx/**/*
documentation	*.md
duplicate	-
enhancement	-
gamedata	gamedata/**/*
help wanted	-
invalid	-
module: cstrike	modules/cstrike/cstrike/**/*
module: csx	modules/cstrike/csx/**/*
module: dodfun	modules/dod/dodfun/**/*
module: dodx	modules/dod/dodx/**/*
module: engine	modules/engine/**/*
module: fakemeta	modules/fakemeta/**/*
module: fun	modules/fun/**/*
module: geoip	modules/geoip/**/*
module: hamsandwich	modules/hamsandwich/**/*
module: json	modules/json/**/*
module: mysql	modules/mysqlx/**/*
module: ns	modules/ns/**/*
module: nvault	modules/nvault/**/*
module: regex	modules/regex/**/*
module: socket	modules/sockets/**/*
module: sqlite	modules/sqlite/**/*
module: tfcx	modules/tfcx/**/*
module: tse	modules/ts/**/*
modules	modules/**/*
needs testing	-
on hold	-
plugin	plugins/**/*
question	-
regression	-
ReSDK	public/resdk/**/*
third-party	third_party/**/*
translation	plugins/lang/**/*
typo	-
wip	-
wontfix	-

[ShootingKing-AM]

@Arkshine

[ShootingKing-AM]

@dvander This PR just adds already existing labels to PRs nothing else.