c: Add local queries

runtime/queries/c/locals.scm

@@ -0,0 +1,22 @@
+; Scopes
+[
+  (function_definition)
+  (if_statement)
+  (for_statement)
+  (compound_statement)
+] @local.scope
+
+; Definitions
+(declaration
+  declarator: (identifier) @local.definition)
+(parameter_declaration
+  declarator: (identifier) @local.definition)
+(pointer_declarator
+  declarator: (identifier) @local.definition)
+(array_declarator
+  declarator: (identifier) @local.definition)
+(init_declarator
+  declarator: (identifier) @local.definition)
+
+; References
+(identifier) @local.reference