feat(examples): add SvelteKit getting-started starter

[MeritonPylla]

The examples catalog has React and vanilla quickstarts, but no SvelteKit starter. This adds one under examples/sveltekit.

The part worth a look is SSR. SuperDoc only runs in the browser, so if it loads during SSR you get document is not defined. I didn't want to turn SSR off for the whole app, so I set ssr = false on just the editor route and mount the editor in a client-only $effect. Everything else in an app keeps server rendering.

Registered it like the other v2 examples: examples/README.md, go-links/links.json, and published-routes.json.

Tested locally: typecheck / build / Playwright smoke pass, and it renders a real .docx with a clean console.

Re-opened against main for v2 after #3858 (which targeted v1) was closed.

[cubic-dev-ai]

1 issue found across 17 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="examples/sveltekit/playwright.config.ts">

<violation number="1" location="examples/sveltekit/playwright.config.ts:14">
P2: This config binds the webserver to port 4177, which is already used by examples/custom-ui/playwright.config.ts. Since `check:examples` runs every example's Playwright suite with `pnpm --recursive` (parallel by default), sveltekit and custom-ui can start their preview servers concurrently; with --strictPort and reuseExistingServer:false the second one fails to bind, causing intermittent CI failures. Pick a port unique across examples (the sibling configs use 4174–4181).</violation>
</file>

<sub>Reply with feedback, questions, or to request a fix.

Re-trigger cubic</sub>

[cubic-dev-ai]

P2: This config binds the webserver to port 4177, which is already used by examples/custom-ui/playwright.config.ts. Since check:examples runs every example's Playwright suite with pnpm --recursive (parallel by default), sveltekit and custom-ui can start their preview servers concurrently; with --strictPort and reuseExistingServer:false the second one fails to bind, causing intermittent CI failures. Pick a port unique across examples (the sibling configs use 4174–4181).

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At examples/sveltekit/playwright.config.ts, line 14:

<comment>This config binds the webserver to port 4177, which is already used by examples/custom-ui/playwright.config.ts. Since `check:examples` runs every example's Playwright suite with `pnpm --recursive` (parallel by default), sveltekit and custom-ui can start their preview servers concurrently; with --strictPort and reuseExistingServer:false the second one fails to bind, causing intermittent CI failures. Pick a port unique across examples (the sibling configs use 4174–4181).</comment>

<file context>
@@ -0,0 +1,19 @@
+    trace: 'retain-on-failure',
+  },
+  webServer: {
+    command: 'pnpm run build && pnpm run preview --host 127.0.0.1 --port 4177 --strictPort',
+    url: 'http://127.0.0.1:4177',
+    reuseExistingServer: false,
</file context>