feat: add initial project setup with core PDF tools and utilities

- Implement core PDF manipulation tools (split, merge, convert, etc.)
- Add state management and UI utilities
- Set up build configuration with Vite and TailwindCSS
- Include essential dependencies for PDF processing
- Add gitignore and basic project configuration files

vite.config.ts

@@ -0,0 +1,26 @@
+import { defineConfig } from 'vite';
+import tailwindcss from '@tailwindcss/vite'
+import { nodePolyfills } from 'vite-plugin-node-polyfills';
+
+export default defineConfig({
+  plugins: [
+    tailwindcss(),
+    nodePolyfills({
+      include: ['buffer', 'stream', 'util', 'zlib', 'process'],
+      globals: {
+        Buffer: true,
+        global: true,
+        process: true,
+      },
+    }),
+  ],
+  resolve: {
+    alias: {
+      stream: 'stream-browserify',
+      zlib: 'browserify-zlib',
+    },
+  },
+  optimizeDeps: {
+    include: ['pdfkit', 'blob-stream'],
+  },
+});