runtime(typst): Add typst runtime files

closes: #15234

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

runtime/indent/typst.vim

@@ -0,0 +1,18 @@
+" Vim indent file
+" Language:    Typst
+" Maintainer:  Gregory Anders <greg@gpanders.com>
+" Last Change: 2024-07-14
+" Based on:    https://github.com/kaarmu/typst.vim
+
+if exists('b:did_indent')
+  finish
+endif
+let b:did_indent = 1
+
+setlocal expandtab
+setlocal softtabstop=2
+setlocal shiftwidth=2
+setlocal autoindent
+setlocal indentexpr=typst#indentexpr()
+
+let b:undo_indent = 'setl et< sts< sw< ai< inde<'