Remove deprecated entries and fix wrong vuefire repository link

- Remove Weex: retired from Apache Incubator in Dec 2021, no longer
  maintained
- Fix vuefire: pointed to abandoned personal fork (nigeltiany/vuefire)
  instead of the official vuejs/vuefire maintained by the Vue core team
- Remove vue-enterprise-boilerplate: archived by its author in 2021,
  uses deprecated Vue CLI 3

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>