adds bubble sort

ts/linear_search.test.ts

@@ -0,0 +1,12 @@
+function linear_search(haystack: number[], needle: number): boolean {
+	for (let i = 0; i < haystack.length; i++) {
+		if (haystack[i] === needle) {
+			return true;
+		}
+	}
+	return false;
+}
+
+test("test linear search", () => {
+	expect(linear_search([1, 2, 3, 4, 5], 3)).toBe(true);
+})