create ydoc awareness user colors

packages/editor/src/consts/index.ts

@@ -1 +1,2 @@
 export * from './global-code-mirror-editor-key';
+export * from './ydoc-awareness-user-color';

packages/editor/src/consts/ydoc-awareness-user-color.ts

@@ -0,0 +1,14 @@
+import * as random from 'lib0/random';
+
+export const usercolors = [
+  { color: '#30bced', light: '#30bced33' },
+  { color: '#6eeb83', light: '#6eeb8333' },
+  { color: '#ffbc42', light: '#ffbc4233' },
+  { color: '#ecd444', light: '#ecd44433' },
+  { color: '#ee6352', light: '#ee635233' },
+  { color: '#9ac2c9', light: '#9ac2c933' },
+  { color: '#8acb88', light: '#8acb8833' },
+  { color: '#1be7ff', light: '#1be7ff33' },
+];
+
+export const userColor = usercolors[random.uint32() % usercolors.length];