misc: Add vim syntax highlighting file

This is an extremely basic initial version of syntax highlighting, written just
so that I can edit the MCL files in vim and not cry.

The following features are supported:
 - MCL keywords
 - strings (including escape characters)
 - comments
 - built-in resources (as of 0.0.27)

misc/vim/mcl.vim

@@ -0,0 +1,38 @@
+" Vim syntax file
+" Language: mgmt config language
+
+if exists("b:current_syntax")
+	finish
+endif
+
+syn case match
+
+syn keyword mclKeywords if else and or not in func class include import as
+syn keyword mclTypes bool str int float map struct variant
+syn keyword mclBuiltins true false panic
+
+hi def link mclKeywords Keyword
+hi def link mclTypes Type
+hi def link mclBuiltins Constant
+
+syn keyword mclTodo contained TODO FIXME XXX BUG
+syn region mclComment start="#" end="$" contains=mclTodo
+
+hi def link mclTodo Todo
+hi def link mclComment Comment
+
+syn keyword mclResources augeas aws:ec2 bmc:power config:etcd consul:kv cron deploy:tar dhcp:host
+syn keyword mclResources dhcp:range dhcp:server docker:container docker:image exec file
+syn keyword mclResources firewalld group gzip hetzner:vm hostname http:file http:flag http:proxy
+syn keyword mclResources http:server kv mount msg net noop nspawn password pippet pkg print svc
+syn keyword mclResources sysctl tar test tftp:file tftp:server timer user value virt virt:builder
+
+hi def link mclResources Constant
+
+syn region mclString start=+"+ skip=+\\"+ end=+"+ contains=mclEscapeChar
+syn match mclEscapeChar display contained "\\."
+
+hi def link mclString String
+hi def link mclEscapeChar Special
+
+let b:current_syntax = "mcl"