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/clients.ts

@@ -0,0 +1,40 @@
+function hashToInteger(id: string) {
+  let hash = 0;
+  if (id.length === 0) {
+    return hash;
+  }
+  for (let i = 0; i < id.length; i++) {
+    const char = id.charCodeAt(i);
+    hash = (hash << 5) - hash + char;
+  }
+  return hash;
+}
+
+export const getClientColor = (
+  /**
+   * any uniquely identifying key, such as user id or socket id
+   */
+  id: string,
+) => {
+  // to get more even distribution in case `id` is not uniformly distributed to
+  // begin with, we hash it
+  const hash = Math.abs(hashToInteger(id));
+  // we want to get a multiple of 10 number in the range of 0-360 (in other
+  // words a hue value of step size 10). There are 37 such values including 0.
+  const hue = (hash % 37) * 10;
+  const saturation = 100;
+  const lightness = 83;
+
+  return `hsl(${hue}, ${saturation}%, ${lightness}%)`;
+};
+
+/**
+ * returns first char, capitalized
+ */
+export const getNameInitial = (name?: string | null) => {
+  // first char can be a surrogate pair, hence using codePointAt
+  const firstCodePoint = name?.trim()?.codePointAt(0);
+  return (
+    firstCodePoint ? String.fromCodePoint(firstCodePoint) : "?"
+  ).toUpperCase();
+};