feat(create-medusa-app,medusa-cli): Allow clearing project (#4273)

- Added build step
- Added `--no-boilerplate` option to `create-medusa-app` to allow clearing onboarding files
- Clear project files by default in medusa-cli

.changeset/clean-pigs-hope.md

@@ -0,0 +1,7 @@
+---
+"create-medusa-app": patch
+"@medusajs/medusa-cli": patch
+"@medusajs/utils": patch
+---
+
+feat(create-medusa-app,medusa-cli): Allow clearing project