BED-5303: Add tailwind

[maffkipp]

Description

Adds tailwind and associated configuration files to our BHCE UI project. For now, we are just copying over the two new config files in our dockerfile, but since these files may change during local dev relatively frequently (particularly tailwind.config.js) we may want to revisit this approach later.

Motivation and Context

This PR addresses: BED-5303

We need tailwind in this project for upcoming styling work.

How Has This Been Tested?

Confirmed locally that tailwind classes can now be used in the UI project, both in the local docker environment and running the UI app standalone.

Screenshots (optional):

Types of changes

• Chore (a change that does not modify the application functionality)

Checklist:

• I have met the contributing prerequisites
  • Assigned myself to this PR
  • Added the appropriate labels
  • Associated an issue: Issues and Pull Requests README #672
  • Read the Contributing guide: https://github.com/SpecterOps/BloodHound/wiki/Contributing
• I have ensured that related documentation is up-to-date
  • Open API docs
  • Code comments (GoDocs / JSDocs)
• I have followed proper test practices
  • Added/updated tests to cover my changes
  • All new and existing tests passed