Implement build system for Cursor Pro with platform-specific packaging

- Added build.py script to automate the packaging process for macOS and Windows.
- Created CursorKeepAlive.mac.spec and CursorKeepAlive.win.spec for application specifications.
- Updated .gitignore to exclude build artifacts and IDE files.
- Enhanced directory structure for output files and included configuration file handling in the build process.

CursorKeepAlive.mac.spec

@@ -0,0 +1,57 @@
+# -*- mode: python ; coding: utf-8 -*-
+
+a = Analysis(
+    ['cursor_pro_keep_alive.py'],
+    pathex=[],
+    binaries=[],
+    datas=[
+        ('config.ini', '.'),
+        ('turnstilePatch', 'turnstilePatch'),
+        ('cursor_auth_manager.py', '.'),
+    ],
+    hiddenimports=[
+        'cursor_auth_manager'
+    ],
+    hookspath=[],
+    hooksconfig={},
+    runtime_hooks=[],
+    excludes=[],
+    noarchive=False,
+)
+
+pyz = PYZ(a.pure)
+
+exe = EXE(
+    pyz,
+    a.scripts,
+    a.binaries,
+    a.datas,
+    [],
+    name='CursorPro',
+    debug=False,
+    bootloader_ignore_signals=False,
+    strip=False,
+    upx=True,
+    upx_exclude=[],
+    runtime_tmpdir=None,
+    console=True,
+    disable_windowed_traceback=False,
+    argv_emulation=False,
+    target_arch=None,
+    codesign_identity=None,
+    entitlements_file=None,
+    icon=None
+)
+
+app = BUNDLE(
+    exe,
+    name='CursorPro.app',
+    icon=None,
+    bundle_identifier='com.yourcompany.cursorpro',
+    info_plist={
+        'CFBundleShortVersionString': '1.0.0',
+        'CFBundleVersion': '1.0.0',
+        'NSHighResolutionCapable': True,
+        'LSBackgroundOnly': False,
+    },
+)