Reorganize repository structure for better organization

- Move backend code to swingmusic/ folder
- Move client applications to root level (swingmusic-android, swingmusic-desktop, swingmusic-webclient)
- Remove intermediate backend/ and clients/ folders
- Update README with new folder structure and setup instructions
- Clean and organized repository layout

swingmusic/swingmusic.spec

@@ -0,0 +1,62 @@
+# -*- mode: python ; coding: utf-8 -*-
+from PyInstaller.utils.hooks import collect_submodules, collect_data_files
+from platform import system, machine
+import pathlib
+
+hiddenimports =[]
+# hiddenimports += collect_submodules('swingmusic')
+datas = [('client.zip', '.')]
+datas += collect_data_files('swingmusic', True, excludes=['**/*.py'], includes=['**/*.*'])
+datas += collect_data_files('flask_openapi3', True, excludes=['**/*.py'], includes=['**/*.*'])
+
+def getFlaskOpenApiPath():
+    return importlib.resources.files("flask_openapi3")
+
+
+
+a = Analysis(
+    ['run.py'],
+    pathex=[],
+    binaries=[],
+    datas=datas,
+    hiddenimports=hiddenimports,
+    hookspath=[],
+    hooksconfig={},
+    runtime_hooks=[],
+    excludes=[],
+    noarchive=False,
+    optimize=0,
+)
+pyz = PYZ(a.pure)
+
+exe = EXE(
+    pyz,
+    a.scripts,
+    a.binaries,
+    a.datas,
+    [],
+    name=f'swingmusic_{system().lower()}_{machine().lower()}',
+    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=[pathlib.Path('src\\swingmusic\\assets\\logo-fill.light.ico')],
+)
+
+coll = COLLECT(
+    exe,
+    a.binaries,
+    a.datas,
+    strip=False,
+    upx=True,
+    upx_exclude=[],
+    name='name_test',
+)