feat(triggers): Add frontend for smart triggers

[Josh-Matsuoka]

Welcome to Cryostat! 👋

Before contributing, make sure you have:

• Read the contributing guidelines
• Linked a relevant issue which this PR resolves
• Linked any other relevant issues, PR's, or documentation, if any
• Resolved all conflicts, if any
• Rebased your branch PR on top of the latest upstream main branch
• Attached at least one of the following labels to the PR: [chore, ci, docs, feat, fix, test]
• Signed all commits using a GPG signature

To recreate commits with GPG signature git fetch upstream && git rebase --force --gpg-sign upstream/main

---

Related to: cryostatio/cryostat-agent#225

Depends on: cryostatio/cryostat-agent#780 cryostatio/cryostat-core#625 cryostatio/cryostat#1250

Description of the change:

Adds a frontend showing active smart triggers for a target

Motivation for the change:

This change is helpful because users may want to copy the example for easier use...

How to manually test:

• Check out and build/run all dependent PRs
• Start a target with the newly built agent instance
• Test that existing smart triggers are picked up by the UI
• Test the functionality of the triggers UI (Display, creation, deletion)

Opening as draft until tests are added.