[POC] feat: node-based muxing editor

[alex-mcgovern]

This is just a POC. The idea is a graphical, node-based approach to configuring muxing.

This is effectively similar to the the existing approach, but has some benefits:

• more "cool" factor
• less repetition — you can route multiple matches to the same model

What is required to make this prod ready

• re-ordering (the current implementation of muxing in codegate works sequentially — i.e. you pass an array of "matchers" and the first one to match dictates the routing, with a fall-through ("catch-all") case last — we would have to make this very obvious in the UI)
• "smarter" layout
• FIM support
• real data — this is a UI only POC at this stage
• validation

[stacklok-cloud-staging]

Minder Vulnerability Report ✅

Minder analyzed this PR and found it does not add any new vulnerable dependencies.

Vulnerability scan of 6020654e:

• 🐞 vulnerable packages: 0
• 🛠 fixes available for: 0

[coveralls]

Pull Request Test Coverage Report for Build 13578817349

Details

• 9 of 35 (25.71%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-1.0%) to 68.654%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/routes/route-mux-config.tsx	9	35	25.71%

Totals
Change from base Build 13540948529:	-1.0%
Covered Lines:	871
Relevant Lines:	1211

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💛 - Coveralls