docs(javascript): Add Pi Durable guide (#19873)

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## DESCRIBE YOUR PR

Adds a dedicated `javascript.pi-durable` platform guide for the Pi
Durable integration added in getsentry/sentry-javascript#24993 (see also
the [Pi Durable announcement](https://earendil.com/posts/pi-durable/)).
It follows the same structure as the Flue, Eve, and Mastra guides.

- `docs/platforms/javascript/guides/pi-durable/index.mdx`: Node.js setup
(preload `instrument.mjs` with `--import`, or use the bundler plugin)
- `docs/platforms/javascript/guides/pi-durable/cloudflare.mdx`:
Cloudflare setup (`sentryCloudflareVitePlugin()` +
`instrument.server.ts`, with an Agents SDK `PiHarness` example)
- `includes/pi-durable/`: shared sections covering experimental status,
captured telemetry (`gen_ai.invoke_agent` / `gen_ai.chat` /
`gen_ai.execute_tool`), conversation IDs across restarts, crash
recovery, captured errors, which provider integrations get skipped,
current gaps, verification, and next steps
- Adds `javascript.pi-durable` to common-page platform lists wherever
Mastra appears (install-method pages stay visible, since a Pi Durable
app controls its own startup)
- Adds a Pi icon (`src/icons/pi-durable.svg`), plus entries on the Agent
Tracing index and the Agents getting-started page

Bun and Deno are left out for now because their setup couldn't be
verified. Only Node and Cloudflare are documented.

## IS YOUR CHANGE URGENT?

- [ ] Urgent deadline (GA date, etc.): YYYY-MM-DD
- [ ] Other deadline: YYYY-MM-DD
- [x] No deadline: Not urgent, can wait up to 1 week+

## SLA

- Teamwork makes the dream work, so please add a reviewer to your PRs.
- Please give the docs team up to 1 week to review your PR unless you've
supplied a deadline.

## PRE-MERGE CHECKLIST

- [ ] Checked Vercel preview for correctness, including links
- [ ] PR was reviewed and approved by any necessary SMEs (subject matter
experts)
- [ ] PR was reviewed and approved by a member of the [Sentry docs
team](https://github.com/orgs/getsentry/teams/docs)

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via **Andrei Borza**.
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---------

Co-authored-by: sentry-junior[bot] <264270552+sentry-junior[bot]@users.noreply.github.com>
Co-authored-by: Andrei Borza <andrei.borza@sentry.io>

Author: sentry-junior[bot]

docs/platforms/javascript/common/agent-tracing/index.mdx

@@ -99,6 +99,12 @@ As of SDK version `11.0.0`, Sentry auto-instruments the most popular AI SDKs and
       title: "Flue",
       icon: "flue",
     },
+    {
+      to: "/agent-tracing/pi-durable/",
+      href: "/platforms/javascript/guides/pi-durable/",
+      title: "Pi Durable",
+      icon: "pi-durable",
+    },
   ]}
 />
 

docs/platforms/javascript/common/configuration/event-loop-block.mdx

@@ -7,6 +7,7 @@ supported:
   - javascript.eve
   - javascript.flue
   - javascript.mastra
+  - javascript.pi-durable
   - javascript.aws-lambda
   - javascript.azure-functions
   - javascript.express

docs/platforms/javascript/common/configuration/integrations/anthropic.mdx

@@ -6,6 +6,7 @@ supportedCategories:
   - serverless
 notSupported:
   - javascript.mastra
+  - javascript.pi-durable
 ---
 
 <Alert>

docs/platforms/javascript/common/configuration/integrations/firebase.mdx

@@ -6,6 +6,7 @@ supported:
   - javascript.eve
   - javascript.flue
   - javascript.mastra
+  - javascript.pi-durable
   - javascript.firebase
   - javascript.gcp-functions
   - javascript.astro

docs/platforms/javascript/common/configuration/integrations/google-genai.mdx

@@ -6,6 +6,7 @@ supportedCategories:
   - serverless
 notSupported:
   - javascript.mastra
+  - javascript.pi-durable
 ---
 
 <Alert>

docs/platforms/javascript/common/configuration/integrations/groq.mdx

@@ -6,6 +6,7 @@ supportedCategories:
   - serverless
 notSupported:
   - javascript.mastra
+  - javascript.pi-durable
 ---
 
 <Alert>

docs/platforms/javascript/common/configuration/integrations/langchain.mdx

@@ -6,6 +6,7 @@ supportedCategories:
   - serverless
 notSupported:
   - javascript.mastra
+  - javascript.pi-durable
 ---
 
 <Alert>

docs/platforms/javascript/common/configuration/integrations/langgraph.mdx

@@ -6,6 +6,7 @@ supportedCategories:
   - serverless
 notSupported:
   - javascript.mastra
+  - javascript.pi-durable
 ---
 
 <Alert>

docs/platforms/javascript/common/configuration/integrations/mistral.mdx

@@ -6,6 +6,7 @@ supportedCategories:
   - serverless
 notSupported:
   - javascript.mastra
+  - javascript.pi-durable
 ---
 
 <Alert>

docs/platforms/javascript/common/configuration/integrations/nest.mdx

@@ -6,6 +6,7 @@ supported:
   - javascript.eve
   - javascript.flue
   - javascript.mastra
+  - javascript.pi-durable
   - javascript.nestjs
 ---