Entity UIs: change VUE_APP_PATH to "/"

With the recent URL updates in Dev, Filings UI, Create UI and Edit UI no longer need extensive URLs (like "/businesses/edit") for local development. Simplifying this will make it easier for future, local development.

This ticket is to change the VUE_APP_PATH for all 3 UIs to "/".

- [ ] ~update ".env.example" in Filings UI~ done in https://github.com/bcgov/business-filings-ui/pull/486
- [ ] update ".env.example" in Create UI
- [ ] update ".env.example" in Edit UI
- [ ] test-run all apps locally

Start with the .env.example files in Create UI and Edit UI and compare their VUE_APP_PATH values with the completed Filings UI change linked in the issue. Update the two remaining values to "/", then test-run all three apps locally and confirm local development works with the simplified paths.

Written by the indexing model from the issue text.