Update runtime files.

runtime/syntax/lc.vim

@@ -0,0 +1,31 @@
+" Vim syntax file
+" Language:     Elsa
+" Maintainer:   Miles Glapa-Grossklag <miles@glapa-grossklag.com>
+" Last Change:  2023-01-29
+
+if exists('b:current_syntax')
+  finish
+endif
+
+" Keywords
+syntax keyword elsaKeyword let eval
+syntax match elsaKeyword "\v:"
+highlight link elsaKeyword Keyword
+
+" Comments
+setlocal commentstring=--%s
+syntax match elsaComment "\v--.*$"
+highlight link elsaComment Comment
+
+" Operators
+syntax match elsaOperator "\v\="
+syntax match elsaOperator "\v\=[abd*~]\>"
+syntax match elsaOperator "\v-\>"
+syntax match elsaOperator "\v\\"
+highlight link elsaOperator Operator
+
+" Definitions
+syntax match elsaConstant "\v[A-Z]+[A-Z_0-9]*"
+highlight link elsaConstant Constant
+
+let b:current_syntax = 'elsa'