runtime(hcl,terraform): Add runtime files for HCL and Terraform

closes: #15618

Signed-off-by: Gregory Anders <greg@gpanders.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/syntax/hcl.vim

@@ -0,0 +1,66 @@
+" Vim syntax file
+" Language:    HCL
+" Maintainer:  Gregory Anders
+" Upstream:    https://github.com/hashivim/vim-terraform
+" Last Change: 2024-09-03
+
+if exists('b:current_syntax')
+  finish
+endif
+
+syn iskeyword a-z,A-Z,48-57,_,-
+
+syn case match
+
+" A block is introduced by a type, some number of labels - which are either
+" strings or identifiers - and an opening curly brace.  Match the type.
+syn match hclBlockType /^\s*\zs\K\k*\ze\s\+\(\("\K\k*"\|\K\k*\)\s\+\)*{/
+
+" An attribute name is an identifier followed by an equals sign.
+syn match hclAttributeAssignment /\(\K\k*\.\)*\K\k*\s\+=\s/ contains=hclAttributeName
+syn match hclAttributeName /\<\K\k*\>/ contained
+
+syn keyword hclValueBool true false
+
+syn keyword hclTodo         contained TODO FIXME XXX BUG
+syn region  hclComment      start="/\*" end="\*/" contains=hclTodo,@Spell
+syn region  hclComment      start="#" end="$" contains=hclTodo,@Spell
+syn region  hclComment      start="//" end="$" contains=hclTodo,@Spell
+
+""" misc.
+syn match hclValueDec      "\<[0-9]\+\([kKmMgG]b\?\)\?\>"
+syn match hclValueHexaDec  "\<0x[0-9a-f]\+\([kKmMgG]b\?\)\?\>"
+syn match hclBraces        "[\[\]]"
+
+""" skip \" and \\ in strings.
+syn region hclValueString   start=/"/ skip=/\\\\\|\\"/ end=/"/ contains=hclStringInterp
+syn region hclStringInterp  matchgroup=hclBraces start=/\(^\|[^$]\)\$\zs{/ end=/}/ contained contains=ALLBUT,hclAttributeName
+syn region hclHereDocText   start=/<<-\?\z([a-z0-9A-Z]\+\)/ end=/^\s*\z1/ contains=hclStringInterp
+
+"" Functions.
+syn match hclFunction "[a-z0-9]\+(\@="
+
+""" HCL2
+syn keyword hclRepeat         for in
+syn keyword hclConditional    if
+syn keyword hclValueNull      null
+
+" enable block folding
+syn region hclBlockBody matchgroup=hclBraces start="{" end="}" fold transparent
+
+hi def link hclComment           Comment
+hi def link hclTodo              Todo
+hi def link hclBraces            Delimiter
+hi def link hclAttributeName     Identifier
+hi def link hclBlockType         Type
+hi def link hclValueBool         Boolean
+hi def link hclValueDec          Number
+hi def link hclValueHexaDec      Number
+hi def link hclValueString       String
+hi def link hclHereDocText       String
+hi def link hclFunction          Function
+hi def link hclRepeat            Repeat
+hi def link hclConditional       Conditional
+hi def link hclValueNull         Constant
+
+let b:current_syntax = 'hcl'

runtime/syntax/terraform.vim

@@ -0,0 +1,17 @@
+" Vim syntax file
+" Language:    Terraform
+" Maintainer:  Gregory Anders
+" Upstream:    https://github.com/hashivim/vim-terraform
+" Last Change: 2024-09-03
+
+if exists('b:current_syntax')
+  finish
+endif
+
+runtime! syntax/hcl.vim
+
+syn keyword terraType string bool number object tuple list map set any
+
+hi def link terraType Type
+
+let b:current_syntax = 'terraform'