feat(multipart-form): concurrent rxjs version (#17)

Completely reimplement the multipart-form package using rxjs.

Release-As: 1.0.0-alpha.1

Author: vabatta

.vscode/launch.json

@@ -0,0 +1,17 @@
+{
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"name": "Debug Jest Tests",
+			"type": "node",
+			"request": "launch",
+			"runtimeArgs": [
+				"--inspect-brk",
+				"${workspaceRoot}/node_modules/jest/bin/jest.js",
+				"--runInBand"
+			],
+			"console": "integratedTerminal",
+			"internalConsoleOptions": "neverOpen"
+		}
+	]
+}

README.md

@@ -25,15 +25,14 @@ npm install @proventuslabs/nestjs-zod
 
 ### [@proventuslabs/nestjs-multipart-form](./packages/multipart-form/)
 
-A lightweight and efficient NestJS package for handling multipart form data and file uploads with streaming support and type safety.
+A lightweight NestJS package for handling multipart form data with RxJS streaming, type safety, and composable operators.
 
 **Features:**
-- 📁 **Streaming File Uploads**: Handle large files efficiently with Node.js streams
-- 🎯 **Type-Safe Decorators**: Built-in decorators for single and multiple file uploads
-- 🔧 **Flexible Configuration**: Customizable Busboy configuration options
-- 🛡️ **Validation Support**: Built-in validation for required files and fields
-- ⚡ **High Performance**: Lightweight implementation with minimal overhead (busboy)
-- 🔄 **Express Integration**: Seamless integration with Express.js applications
+- 🔄 **RxJS Streaming**: Process files/fields as they arrive, not after complete parsing
+- 🎯 **Type-Safe**: Full TypeScript support with `MultipartFileStream` and `MultipartFileBuffer`
+- 🔧 **Composable Operators**: Reusable operators for filtering, validation, and transformation
+- 🛡️ **Pattern Matching**: Support for exact matches and "starts with" patterns (`^prefix_`)
+- 🚨 **Error Handling**: Built-in validation with proper HTTP status codes
 
 **Installation:**
 ```bash