feat(sdk): ToolSet typing for toolFromTask, ai.toolExecute, deprecate ai.tool

- Assert toolFromTask return as AI SDK ToolSet-compatible; import ToolSet from ai
- Add changesets for @trigger.dev/sdk
- ai-chat reference: chat-tools module, registry language model helper, streamText cleanup
- Prisma migration removing user tool demo; demo docs and next config tweaks

Author: ericallam

.changeset/ai-tool-execute-helper.md

@@ -0,0 +1,5 @@
+---
+"@trigger.dev/sdk": patch
+---
+
+Add `ai.toolExecute(task)` so you can pass Trigger's subtask/metadata wiring as the `execute` handler to AI SDK `tool()` while defining `description` and `inputSchema` yourself. Refactors `ai.tool()` to share the same internal handler.

.changeset/ai-tool-toolset-typing.md

@@ -0,0 +1,6 @@
+---
+"@trigger.dev/sdk": patch
+---
+
+Align `ai.tool()` (`toolFromTask`) with the AI SDK `ToolSet` shape: Zod-backed tasks use static `tool()`; returns are asserted as `Tool & ToolSet[string]`. Raise the SDK's minimum `ai` devDependency to `^6.0.116` so emitted types resolve the same `ToolSet` as apps on AI SDK 6.0.x (avoids cross-version `ToolSet` mismatches in monorepos).
+

.changeset/dry-sloths-divide.md

@@ -0,0 +1,5 @@
+---
+"@trigger.dev/sdk": patch
+---
+
+Add `chat.withUIMessage<TUIMessage>()` for typed AI SDK `UIMessage` in chat task hooks, optional factory `streamOptions` merged with `uiMessageStreamOptions`, and `InferChatUIMessage` helper. Generic `ChatUIMessageStreamOptions`, compaction, and pending-message event types. `usePendingMessages` accepts a UI message type parameter; re-export `InferChatUIMessage` from `@trigger.dev/sdk/chat/react`.

packages/trigger-sdk/package.json

@@ -78,7 +78,7 @@
     "@types/slug": "^5.0.3",
     "@types/uuid": "^9.0.0",
     "@types/ws": "^8.5.3",
-    "ai": "^6.0.0",
+    "ai": "^6.0.116",
     "encoding": "^0.1.13",
     "rimraf": "^3.0.2",
     "tshy": "^3.0.2",