feat: add an API to time out query executions

Currently, if a predicate is hard to match on the Rust side, a sizable
query against a very large file can take forever, and ends up hanging.
This commit adds an API function `ts_query_cursor_set_timeout_micros` to
limit how long query execution is allowed to take, thereby negating the
chance of a hang to occur.

lib/binding_web/test/query-test.js

@@ -451,6 +451,17 @@ describe('Query', () => {
       ]);
     });
   });
+
+  describe('Set a timeout', () =>
+    it('returns less than the expected matches', () => {
+      tree = parser.parse('function foo() while (true) { } }\n'.repeat(1000));
+      query = JavaScript.query('(function_declaration name: (identifier) @function)');
+      const matches = query.matches(tree.rootNode, { timeoutMicros: 1000 });
+      assert.isBelow(matches.length, 1000);
+      const matches2 = query.matches(tree.rootNode, { timeoutMicros: 0 });
+      assert.equal(matches2.length, 1000);
+    })
+  );
 });
 
 function formatMatches(matches) {