docs: fix API documentation inconsistencies and improve accuracy

Author: rajephon

ts/docs/api/overview.md

@@ -14,23 +14,26 @@ The parser module contains streaming-aware data types and the core parser for pr
 - **[`Atom`](parser.md#Atom)** - Represents atomic values (numbers, booleans, null)
 - **[`Parser`](parser.md#Parser)** - Processes token streams and triggers callbacks
 
-### Helper Classes
+### Schema Builder Functions
 
-- **[`Field`](parser.md#Field)** - Field descriptor with validation and metadata (pydantic equivalent)
-- **[`ZodType`](parser.md#ZodType)** - Type hint for Zod schema specification
+- **[`string()`](parser.md#string)** - Create a streaming string schema
+- **[`array(itemSchema)`](parser.md#array)** - Create a streaming array schema
+- **[`object(fields)`](parser.md#object)** - Create a streaming object schema
+- **[`number()`](parser.md#number)** - Create a number atom schema
+- **[`boolean()`](parser.md#boolean)** - Create a boolean atom schema
+- **[`atom(zodSchema)`](parser.md#atom)** - Create a custom atom schema
+- **[`fromZod(zodSchema)`](parser.md#fromZod)** - Create streaming schema from Zod schema
 
 ### Type Aliases
 
 - **`String`** - Alias for `StreamingString`
-- **`List<T>`** - Alias for `StreamingList<T>`
-- **`Atom<T>`** - Alias for `Atom<T>`
 - **`Object`** - Alias for `StreamingObject`
 
 ### Key Features
 
 - **Event Callbacks**: All streaming types support `onStart`, `onAppend`, and `onComplete` callbacks
 - **Type Safety**: Full TypeScript generics and interfaces for compile-time checking
-- **Zod Integration**: Convert streaming models to Zod schemas via `toZod()` and `fromZod()`
+- **Zod Integration**: Convert streaming schemas to Zod schemas via `toZod()` and create from Zod schemas via `fromZod()`
 
 ## Tracker Module  
 
@@ -52,40 +55,33 @@ The tracker module provides change tracking capabilities for generating JSON Pat
 ### Basic Streaming
 
 ```typescript
-import { StreamingObject, StreamingString, StreamingList, Parser } from 'langdiff';
+import * as ld from '@langdiff/langdiff';
 
-// Define schema
-class Response extends StreamingObject {
-  title!: StreamingString;
-  items!: StreamingList<StreamingString>;
-
-  protected _initializeFields(): void {
-    this.addField('title', new StreamingString());
-    this.addField('items', new StreamingList(StreamingString));
-  }
-}
+// Define schema using the modern functional API
+const Response = ld.object({
+  title: ld.string(),
+  items: ld.array(ld.string())
+});
 
 // Set up callbacks
-const response = new Response();
+const response = Response.create();
 
 response.title.onAppend((chunk: string) => {
   console.log(`Title: ${chunk}`);
 });
 
 // Parse stream
-const parser = new Parser(response);
-parser.use((p) => {
-  for (const token of stream) {
-    p.push(token);
-  }
-  // complete() is called automatically
-});
+const parser = new ld.Parser(response);
+for (const chunk of streamChunks) {
+  parser.push(chunk);
+}
+parser.complete();
 ```
 
 ### Change Tracking
 
 ```typescript
-import { trackChange } from 'langdiff';
+import { trackChange } from '@langdiff/langdiff';
 
 interface UI {
   items: string[];