Dispute kit structure simplification

[unknownunknown1]

1. disputeKitNodes[] and DisputeKitNode structure replaced with simple disputeKits[] array that stores the addresses of all added dispute kits.
2. Preemptively added disabled boolean was also removed. It was added earlier in case of future upgrades but since the struct doesn't exist anymore it can be added with a simple mapping, if needed.
3. Previously the main requirement for new dispute kits was that the root dispute kit must always be supported by General court, but that actually was a mistake since even Sybil resistant dispute kit can't possibly be supported by General court simply because its disputes can go up to 511 jurors. On the other hand we could make Sybil resistant DK the child of Classic DK but in any case this type of structure adds complexity and can lead to human errors, esp for more nuanced cases. So right now the main requirement for all dispute kits is the support of Classic dispute kit which actually makes it feature parity with V1. So if in case of a court jump during appeal the parent court doesn't support the current DK it will simply switch to Classic and continue from there.
4. Following the previous point, SEARCH_ITERATIONS is removed as not needed

---

PR-Codex overview

This PR focuses on refactoring the DisputeKit functionality and adding support for new dispute kits.

Detailed summary

• Refactored the DisputeKit functionality by removing the DisputeKitNode struct and replacing it with an array of IDisputeKit.
• Added support for new dispute kits by adding a new function addNewDisputeKit and modifying the enableDisputeKits function.
• Updated the event DisputeKitCreated to remove the _parent parameter.
• Added checks to ensure that the Classic dispute kit is always supported by all courts.

The following files were skipped due to too many changes: contracts/src/arbitration/KlerosCore.sol

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

[netlify]

✅ Deploy Preview for kleros-v2 ready!

Name	Link
🔨 Latest commit	4a007e3
🔍 Latest deploy log	https://app.netlify.com/sites/kleros-v2/deploys/657208f4516e540008dcaad4
😎 Deploy Preview	https://deploy-preview-1320--kleros-v2.netlify.app/
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codeclimate]

Code Climate has analyzed commit 4a007e3 and detected 0 issues on this pull request.

View more on Code Climate.