chore: Move to Typescript (#2783)

This PR moves the entire project to Typescript. Due to the ~1000 ignores this will lead to a messy codebase for a while, but the churn is worth it – all of those ignore comments are places that were never type-safe previously.

closes #1282

shared/embeds/Marvel.test.ts

@@ -0,0 +1,14 @@
+import Marvel from "./Marvel";
+
+describe("Marvel", () => {
+  const match = Marvel.ENABLED[0];
+
+  test("to be enabled on share link", () => {
+    expect("https://marvelapp.com/75hj91".match(match)).toBeTruthy();
+  });
+
+  test("to not be enabled elsewhere", () => {
+    expect("https://marvelapp.com".match(match)).toBe(null);
+    expect("https://marvelapp.com/features".match(match)).toBe(null);
+  });
+});