Add initial version of MAINTAINERS file (#16438)

* Add initial version of MAINTAINERS file

This is a first effort in trying to split the review process to multiple
people that should be specialized in some particular areas of the
project. This will ensure higher review quality and more distributed
process.

* Update MAINTAINERS

* Converts to GH usernames

* Use CODEOWNERS instead of MAINTAINERS

See
https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners

* No need to mention CODEOWNERS, it's automatically used by GH

* Add yossizap on some components

* Who owns CODEOWNERS itself? :D

Co-authored-by: Anton Kochkov <xvilka@gmail.com>

CODEOWNERS

@@ -0,0 +1,35 @@
+* @radare
+*.js @radare
+CODEOWNERS @radare @XVilka @kazarmy @thestr4ng3r @ret2libc
+libr/anal/ @thestr4ng3r
+libr/anal/esil* @radare @condret
+libr/anal/xrefs.c ret2libc
+libr/arch/gb/ @condret
+libr/asm/ @wargio @radare
+libr/asm/p/x86_* @ret2libc
+libr/asm/p/arm_* @radare
+libr/bin/ @ret2libc @radare
+libr/bin/format/elf/ @ret2libc @kazarmy
+libr/bin/format/mach0/ @radare
+libr/bin/format/objc/ @radare
+libr/bin/format/wasm/ @wargio
+libr/config/ @radare @ret2libc
+libr/cons/ @thestr4ng3r @radare
+libr/debug/ @yossizap @radare
+libr/egg/ @radare
+libr/flag/ @ret2libc @radare
+libr/fs/ @radare
+libr/io/ @condret @radare @ret2libc
+libr/lang/ @thestr4ng3r @radare @ret2libc
+libr/magic/ @radare
+libr/parse/ @ret2libc @radare
+libr/reg/ @XVilka @radare
+libr/socket/ @XVilka @yossizap
+libr/syscall/ @ret2libc @radare
+libr/util/ @ret2libc @thestr4ng3r
+shlr/gdb/ @yossizap
+shlr/ptrace-wrap/ @thestr4ng3r
+shlr/radare2-shell-parser/ @ret2libc
+shlr/tcc/ @XVilka @radare
+shlr/w32dbg_wrap/ @yossizap
+shlr/windbg/ @yossizap