chore: Unify math types, utils and functions (#8389)

Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>

packages/math/README.md

@@ -0,0 +1,21 @@
+# @excalidraw/math
+
+## Install
+
+```bash
+npm install @excalidraw/math
+```
+
+If you prefer Yarn over npm, use this command to install the Excalidraw utils package:
+
+```bash
+yarn add @excalidraw/math
+```
+
+With PNPM, similarly install the package with this command:
+
+```bash
+pnpm add @excalidraw/math
+```
+
+## API