feat: Delta-based streaming (#6)

* feat: implement delta-based streaming with O(n) bandwidth efficiency

## Major Changes

### Delta-Based Streaming Architecture
- Replace O(n²) accumulated content streaming with O(n) delta-based streaming
- Add `streamingMessages` table for stream lifecycle tracking
- Add `streamDeltas` table for storing incremental text chunks
- Implement `DeltaStreamer` class for batched, throttled delta writes

### New Stream API
- `stream.create` - Create a new stream for a conversation
- `stream.addDelta` - Add incremental content (returns false if aborted)
- `stream.finish` - Mark stream complete, clean up deltas
- `stream.abort` / `stream.abortByConversation` - Cancel generation
- `stream.getStream` - Get stream state (streaming/finished/aborted)
- `stream.listDeltas` - Fetch deltas from cursor position

### Abort Support
- Users can stop generation mid-stream with proper cleanup
- Stream abort propagates to LLM via early return from addDelta
- React hooks handle abort state to prevent error display
- Added `wasAbortedRef` pattern to ignore aborted request results

### Text Smoothing
- Add `useSmoothText` hook for typewriter effect on streaming text
- Add `SmoothText` component for easy integration
- Adaptive speed that matches text arrival rate
- Configurable chars/second, min/max delay

### Removed Backwards Compatibility
- Remove deprecated `stream.init`, `stream.update`, `stream.clear`
- Remove deprecated `stream.getContent` query
- Remove `getStreamingContent` from client wrapper
- Remove `StreamingState` type (use `StreamState` instead)
- Remove legacy tests

### Example App Improvements
- Implement Stop button with immediate feedback
- Add `isStopping` state for better UX
- Localhost detection to bypass rate limits in dev
- Filter abort-related errors from display

### Documentation
- Comprehensive README update with delta streaming examples
- Document new streaming API and abort functionality
- Add text smoothing usage examples
- Update API reference table

## Files Changed
- convex/component/stream.ts - New delta-based streaming mutations/queries
- convex/component/deltaStreamer.ts - DeltaStreamer class (new file)
- convex/component/schema.ts - Add streamingMessages, streamDeltas tables
- convex/component/client.ts - Remove deprecated methods, update docs
- src/react.tsx - Delta accumulation, abort handling, useSmoothText
- src/index.ts - Export new hooks and components
- example/ - Updated to use delta streaming with abort support
- README.md - Complete documentation overhaul

* chore: add convex generated files for type safety

Include convex/_generated/ files to enable TypeScript type checking
and editor autocomplete without requiring npx convex dev to be run.

Author: dayhaysoos

.cursor/rules/convex_rules.mdc

@@ -198,7 +198,7 @@ export const exampleQuery = query({
     handler: async (ctx, args) => {
         const idToUsername: Record<Id<"users">, string> = {};
         for (const userId of args.userIds) {
-            const user = await ctx.db.get(userId);
+            const user = await ctx.db.get("users", userId);
             if (user) {
                 idToUsername[user._id] = user.username;
             }
@@ -236,8 +236,8 @@ const messages = await ctx.db
 
 
 ## Mutation guidelines
-- Use `ctx.db.replace` to fully replace an existing document. This method will throw an error if the document does not exist.
-- Use `ctx.db.patch` to shallow merge updates into an existing document. This method will throw an error if the document does not exist.
+- Use `ctx.db.replace` to fully replace an existing document. This method will throw an error if the document does not exist. Syntax: `await ctx.db.replace('tasks', taskId, { name: 'Buy milk', completed: false })`
+- Use `ctx.db.patch` to shallow merge updates into an existing document. This method will throw an error if the document does not exist. Syntax: `await ctx.db.patch('tasks', taskId, { completed: true })`
 
 ## Action guidelines
 - Always add `"use node";` to the top of files containing actions that use Node.js built-in modules.
@@ -307,7 +307,7 @@ export const exampleQuery = query({
     args: { fileId: v.id("_storage") },
     returns: v.null(),
     handler: async (ctx, args) => {
-        const metadata: FileMetadata | null = await ctx.db.system.get(args.fileId);
+        const metadata: FileMetadata | null = await ctx.db.system.get("_storage", args.fileId);
         console.log(metadata);
         return null;
     },
@@ -434,7 +434,7 @@ Internal Functions:
   "description": "This example shows how to build a chat app without authentication.",
   "version": "1.0.0",
   "dependencies": {
-    "convex": "^1.17.4",
+    "convex": "^1.31.2",
     "openai": "^4.79.0"
   },
   "devDependencies": {
@@ -667,6 +667,35 @@ export default defineSchema({
 });
 ```
 
+#### convex/tsconfig.json
+```typescript
+{
+  /* This TypeScript project config describes the environment that
+   * Convex functions run in and is used to typecheck them.
+   * You can modify it, but some settings required to use Convex.
+   */
+  "compilerOptions": {
+    /* These settings are not required by Convex and can be modified. */
+    "allowJs": true,
+    "strict": true,
+    "moduleResolution": "Bundler",
+    "jsx": "react-jsx",
+    "skipLibCheck": true,
+    "allowSyntheticDefaultImports": true,
+
+    /* These compiler options are required by Convex */
+    "target": "ESNext",
+    "lib": ["ES2021", "dom"],
+    "forceConsistentCasingInFileNames": true,
+    "module": "ESNext",
+    "isolatedModules": true,
+    "noEmit": true
+  },
+  "include": ["./**/*"],
+  "exclude": ["./_generated"]
+}
+```
+
 #### src/App.tsx
 ```typescript
 export default function App() {