docs: replace stale block-kit-builder references with block-kitchen

.github/ISSUE_TEMPLATE/config.yml

@@ -4,5 +4,5 @@ contact_links:
     url: https://github.com/TightknitAI/block-kitchen/security/advisories/new
     about: Please report security issues privately, not as a public issue.
   - name: Full-stack example app
-    url: https://github.com/TightknitAI/block-kit-builder-template
+    url: https://github.com/TightknitAI/block-kitchen-template
     about: Wiring questions about OAuth, channel listing, or sending belong in the template repo.

README.md

@@ -19,7 +19,7 @@ Inspired by [Slack's Block Kit Builder](https://app.slack.com/block-kit-builder)
   <img src="./assets/screenshot.png" alt="block-kitchen demo screenshot" width="900" />
 </p>
 
-The package owns the entire builder UX — palette, sortable preview surface, per-block popover editors, send dialog. It knows nothing about how channels are listed, who the user is, or how messages are sent. The consumer wires those concerns through callback props. A working end-to-end app is shown in [block-kit-builder-template](https://github.com/TightknitAI/block-kit-builder-template).
+The package owns the entire builder UX — palette, sortable preview surface, per-block popover editors, send dialog. It knows nothing about how channels are listed, who the user is, or how messages are sent. The consumer wires those concerns through callback props. A working end-to-end app is shown in [block-kitchen-template](https://github.com/TightknitAI/block-kitchen-template).
 
 ## Install
 
@@ -143,7 +143,7 @@ import type {
 
 ## Backend
 
-The builder is frontend-only. For a full app that handles OAuth, channel listing, and `chat.postMessage`, see [block-kit-builder-template](https://github.com/TightknitAI/block-kit-builder-template) — a Vite + React SPA on Cloudflare Workers that wires this package to [slack-hono](https://github.com/TightknitAI/slack-hono) on the backend.
+The builder is frontend-only. For a full app that handles OAuth, channel listing, and `chat.postMessage`, see [block-kitchen-template](https://github.com/TightknitAI/block-kitchen-template) — a Vite + React SPA on Cloudflare Workers that wires this package to [slack-hono](https://github.com/TightknitAI/slack-hono) on the backend.
 
 ## Validation
 

demo/src/App.tsx

@@ -37,7 +37,7 @@ const MOCK_CHANNELS: ChannelOption[] = [
 const INITIAL_BLOCKS: SupportedBlock[] = [
   {
     type: 'header',
-    text: { type: 'plain_text', text: 'Welcome to the Block Kit Builder demo' }
+    text: { type: 'plain_text', text: 'Welcome to the Block Kitchen demo' }
   },
   {
     type: 'section',