feat(rifleconf): add parser and queries

runtime/queries/rifleconf/highlights.scm

@@ -0,0 +1,31 @@
+(comment) @comment @spell
+
+[
+  ","
+  ";"
+] @punctuation.delimiter
+
+[
+  "="
+  (condition_negation)
+] @operator
+
+; mark the string values for items interpreted as regex as string.regexp
+(binary_condition_expression
+  (binary_condition_identifier) @_keyword
+  (identifier) @string.regexp
+  (#any-of? @_keyword "match" "ext" "mime" "name" "path"))
+
+(binary_condition_identifier) @keyword
+
+(unary_condition_identifier) @keyword
+
+(condition_expression
+  (binary_condition_expression
+    (binary_condition_identifier) @keyword
+    (identifier) @number)
+  (#eq? @keyword "number"))
+
+(ask) @function.builtin
+
+(string) @string