feat: add c3 (#7891)

runtime/queries/c3/indents.scm

@@ -0,0 +1,73 @@
+[
+  (compound_stmt)
+  (initializer_list)
+  (implies_body)
+  (struct_body)
+  (bitstruct_body)
+  (enum_body)
+  (interface_body)
+  (switch_body)
+  (ct_if_stmt)
+  (ct_for_stmt)
+  (ct_foreach_stmt)
+  (ct_switch_stmt)
+] @indent.begin
+
+([
+  (case_stmt)
+  (default_stmt)
+  (ct_case_stmt)
+] @indent.begin
+  (#set! indent.immediate 1))
+
+(expr_stmt
+  ";" @indent.end) @indent.begin
+
+(declaration
+  ";" @indent.end) @indent.begin
+
+(const_declaration
+  ";" @indent.end) @indent.begin
+
+(return_stmt
+  ";" @indent.end) @indent.begin
+
+(faultdef_declaration
+  ";" @indent.end) @indent.begin
+
+(macro_func_body
+  ";" @indent.end)
+
+[
+  ")"
+  "}"
+  "$endfor"
+  "$endforeach"
+  "$endswitch"
+  "$endif"
+] @indent.branch @indent.end
+
+"$else" @indent.branch
+
+([
+  (func_param_list)
+  (macro_param_list)
+  (enum_param_list)
+  (attribute_param_list)
+  (call_arg_list)
+  (paren_cond)
+  (for_cond)
+  (foreach_cond)
+  (paren_expr)
+] @indent.align
+  (#set! indent.open_delimiter "(")
+  (#set! indent.close_delimiter ")"))
+
+[
+  (block_comment)
+  (doc_comment)
+  (raw_string_literal)
+  (bytes_literal)
+] @indent.auto
+
+(string_literal) @indent.ignore