build: decouple package deps and introduce yarn workspaces (#7415)

* feat: decouple package deps and introduce yarn workspaces

* update root directory

* fix

* fix scripts

* fix lint

* update path in scripts

* remove yarn.lock files from packages

* ignore workspace

* dummy

* dummy

* remove comment check

* revert workflow changes

* ignore ws when installing gh actions

* remove log

* update path

* fix

* fix typo

packages/excalidraw/tests/clients.test.ts

@@ -0,0 +1,39 @@
+import { getNameInitial } from "../clients";
+
+describe("getClientInitials", () => {
+  it("returns substring if one name provided", () => {
+    expect(getNameInitial("Alan")).toBe("A");
+  });
+
+  it("returns initials", () => {
+    expect(getNameInitial("John Doe")).toBe("J");
+  });
+
+  it("returns correct initials if many names provided", () => {
+    expect(getNameInitial("John Alan Doe")).toBe("J");
+  });
+
+  it("returns single initial if 1 letter provided", () => {
+    expect(getNameInitial("z")).toBe("Z");
+  });
+
+  it("trims trailing whitespace", () => {
+    expect(getNameInitial("  q    ")).toBe("Q");
+  });
+
+  it('returns "?" if falsey value provided', () => {
+    expect(getNameInitial("")).toBe("?");
+    expect(getNameInitial(undefined)).toBe("?");
+    expect(getNameInitial(null)).toBe("?");
+  });
+
+  it('returns "?" when value is blank', () => {
+    expect(getNameInitial(" ")).toBe("?");
+  });
+
+  it("works with multibyte strings", () => {
+    expect(getNameInitial("😀")).toBe("😀");
+    // but doesn't work with emoji ZWJ sequences
+    expect(getNameInitial("👨‍👩‍👦")).toBe("👨");
+  });
+});