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/indent/hcl.vim

@@ -0,0 +1,16 @@
+" Vim indent file
+" Language:    HCL
+" Maintainer:  Gregory Anders
+" Upstream:    https://github.com/hashivim/vim-terraform
+" Last Change: 2024-09-03
+
+if exists('b:did_indent')
+  finish
+endif
+let b:did_indent = 1
+
+setlocal autoindent shiftwidth=2 tabstop=2 softtabstop=2 expandtab
+setlocal indentexpr=hcl#indentexpr(v:lnum)
+setlocal indentkeys+=<:>,0=},0=)
+
+let b:undo_indent = 'setlocal ai< sw< ts< sts< et< inde< indk<'