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/utils/parseTitle.test.ts

@@ -0,0 +1,23 @@
+import parseTitle from "./parseTitle";
+
+it("should trim the title", () => {
+  expect(parseTitle(`#    Lots of space     `).title).toBe("Lots of space");
+});
+it("should extract first title", () => {
+  expect(parseTitle(`# Title one\n# Title two`).title).toBe("Title one");
+});
+it("should remove escape characters", () => {
+  expect(parseTitle(`# Thing \\- one`).title).toBe("Thing - one");
+  expect(parseTitle(`# \\[wip\\] Title`).title).toBe("[wip] Title");
+  expect(parseTitle(`# \\> Title`).title).toBe("> Title");
+});
+it("should parse emoji if first character", () => {
+  const parsed = parseTitle(`# 😀 Title`);
+  expect(parsed.title).toBe("😀 Title");
+  expect(parsed.emoji).toBe("😀");
+});
+it("should not parse emoji if not first character", () => {
+  const parsed = parseTitle(`# Title 🌈`);
+  expect(parsed.title).toBe("Title 🌈");
+  expect(parsed.emoji).toBe(undefined);
+});