Re-organize directory structure (#4971)

See discussion in #2491

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stdlib/msilib/schema.pyi

@@ -0,0 +1,97 @@
+import sys
+from typing import List, Optional, Tuple
+
+if sys.platform == "win32":
+    from . import Table
+
+    _Validation: Table
+    ActionText: Table
+    AdminExecuteSequence: Table
+    Condition: Table
+    AdminUISequence: Table
+    AdvtExecuteSequence: Table
+    AdvtUISequence: Table
+    AppId: Table
+    AppSearch: Table
+    Property: Table
+    BBControl: Table
+    Billboard: Table
+    Feature: Table
+    Binary: Table
+    BindImage: Table
+    File: Table
+    CCPSearch: Table
+    CheckBox: Table
+    Class: Table
+    Component: Table
+    Icon: Table
+    ProgId: Table
+    ComboBox: Table
+    CompLocator: Table
+    Complus: Table
+    Directory: Table
+    Control: Table
+    Dialog: Table
+    ControlCondition: Table
+    ControlEvent: Table
+    CreateFolder: Table
+    CustomAction: Table
+    DrLocator: Table
+    DuplicateFile: Table
+    Environment: Table
+    Error: Table
+    EventMapping: Table
+    Extension: Table
+    MIME: Table
+    FeatureComponents: Table
+    FileSFPCatalog: Table
+    SFPCatalog: Table
+    Font: Table
+    IniFile: Table
+    IniLocator: Table
+    InstallExecuteSequence: Table
+    InstallUISequence: Table
+    IsolatedComponent: Table
+    LaunchCondition: Table
+    ListBox: Table
+    ListView: Table
+    LockPermissions: Table
+    Media: Table
+    MoveFile: Table
+    MsiAssembly: Table
+    MsiAssemblyName: Table
+    MsiDigitalCertificate: Table
+    MsiDigitalSignature: Table
+    MsiFileHash: Table
+    MsiPatchHeaders: Table
+    ODBCAttribute: Table
+    ODBCDriver: Table
+    ODBCDataSource: Table
+    ODBCSourceAttribute: Table
+    ODBCTranslator: Table
+    Patch: Table
+    PatchPackage: Table
+    PublishComponent: Table
+    RadioButton: Table
+    Registry: Table
+    RegLocator: Table
+    RemoveFile: Table
+    RemoveIniFile: Table
+    RemoveRegistry: Table
+    ReserveCost: Table
+    SelfReg: Table
+    ServiceControl: Table
+    ServiceInstall: Table
+    Shortcut: Table
+    Signature: Table
+    TextStyle: Table
+    TypeLib: Table
+    UIText: Table
+    Upgrade: Table
+    Verb: Table
+
+    tables: List[Table]
+
+    _Validation_records: List[
+        Tuple[str, str, str, Optional[int], Optional[int], Optional[str], Optional[int], Optional[str], Optional[str], str]
+    ]