docs: add Kokon to UIs

[GabrieleLozupone]

Summary

Adds Kokon to the UIs list.

Kokon is an open-source (AGPL-3.0) desktop photo editor for Windows and macOS built on stable-diffusion.cpp's sd-server: CUDA on NVIDIA, Vulkan on AMD and Intel (beta), Metal on Apple Silicon (beta).

It is deliberately narrower than the other UIs in the list: it's not a general front-end for loading any model. Each release ships one curated, tested setup: the best model I can find for the user's GPU memory budget (today Qwen-Image 2.1 Turbo), with the quantization, resolution and memory settings chosen automatically for that machine. The goal is image generation and editing for people who will never pick a model or a setting. When a better model or engine fits the same budget, the app moves to it in an update.

It also uses the MoSR upscaler support I contributed in #2128, and exposes an MCP server and a local HTTP API on top of the same engine.

I'm the developer. Thanks for stable-diffusion.cpp.

Related Issue / Discussion

None.

Additional Information

Repo: https://github.com/GabrieleLozupone/kokon
Site: https://kokon.app

Checklist

• I have read and confirmed this PR follows the contribution guidelines.

Summary by CodeRabbit

• Documentation
  • Added Kokon to the README’s list of UIs, with a link to its GitHub repository.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Repository UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: 9eb98b70-5f95-4a07-a793-d3e8f2ac7d75

📥 Commits

Reviewing files that changed from the base of the PR and between 1d0a58a and 86a1313.

📒 Files selected for processing: 1

• README.md

Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 9 remain after this review.

📝 Walkthrough

The README now lists Kokon with a link to its GitHub repository.

Changes: UI listing

Layer / File(s)	Summary
Add Kokon to the UI list README.md	The UI list includes Kokon and a link to its GitHub repository.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other

Suggested reviewers: leejet

Merge Risk: ⚪ Minimal · up to 86a13

The README directs readers to Kokon’s intended GitHub repository; no actionable merge risk remains.

### Architecture Summary

Architecture risk: 🔵 Low · up to 86a13

The change affects 1 system.

Changed systems: README.md

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — README.md (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in README.md: Added Kokon, with a link to its GitHub repository, to the UIs list.

Pre-merge checks: 5

Passed checks: 5 passed

Check name	Status	Explanation
Title check		The title clearly and concisely states the main change: adding Kokon to the UIs list.
Description check		The description includes all required sections. It explains the change, provides repository and site links, states that no related issue applies, and confirms the contribution-guidelines checklist.
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create a new PR

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

_{Comment @coderabbitai help to get the list of available commands.}