feat: Matrix connector core — rooms, messaging, sync

- rooms: create, join, leave, forget, list, resolve alias, get info/members,
  invite/kick/ban/unban, set name/topic. RoomInfo/MemberInfo/PowerLevels dataclasses.
- messaging: send text (with HTML, reply, thread), notice, emote, image, file,
  sticker, edit, redact, react, typing, read receipts, fully-read markers.
- sync: SyncEngine with event-type/room/global handler dispatch,
  incremental sync with backoff retry, SyncFilter, paginated message history.
- CLI: rooms (list/create/join/leave/info/members/invite), send (text/image/file),
  sync (listen with filters).
- 182 tests pass (60 existing + 122 new).

src/matrix_hermes/__init__.py

@@ -1,11 +1,155 @@
 """
-Matrix-Hermes: Matrix authentication and client integration for Hermes Agent.
+Matrix-Hermes: Matrix authentication, client, rooms, messaging, and sync integration
+for Hermes Agent.
 
 Provides:
     - Authentication (login, token management, device registration)
     - Async client wrapper around mautrix
-    - CLI tools for setup and token management
+    - Room management (create, join, list, leave, invite, kick, ban)
+    - Messaging (send text, images, files, edits, reactions)
+    - Sync engine (incremental sync, event dispatch, filtering)
+    - CLI tools for all operations
 """
 
-__version__ = "0.1.0"
-__all__ = ["MatrixAuth", "MatrixClient", "MatrixConfig", "__version__"]
+__version__ = "0.3.0"
+
+# Auth
+from matrix_hermes.auth import (
+    AuthResult,
+    WhoAmIResult,
+    login,
+    login_from_config,
+    logout,
+    save_session,
+    load_session,
+    remove_session,
+    validate_token,
+)
+
+# Config
+from matrix_hermes.config import MatrixConfig
+
+# Client
+from matrix_hermes.client import (
+    MatrixClient,
+    MatrixMessage,
+    SendResult,
+    quick_connect,
+)
+
+# Rooms
+from matrix_hermes.rooms import (
+    RoomInfo,
+    CreateRoomResult,
+    MemberInfo,
+    PowerLevels,
+    create_room,
+    join_room,
+    leave_room,
+    forget_room,
+    get_joined_rooms,
+    resolve_room_alias,
+    get_room_info,
+    get_room_members,
+    invite_user,
+    kick_user,
+    ban_user,
+    unban_user,
+    set_room_name,
+    set_room_topic,
+)
+
+# Messaging
+from matrix_hermes.messaging import (
+    send_text,
+    send_notice,
+    send_emote,
+    send_image,
+    send_file,
+    send_sticker,
+    edit_message,
+    redact_message,
+    send_reaction,
+    send_typing,
+    send_read_receipt,
+    set_fully_read,
+)
+
+# Sync
+from matrix_hermes.sync import (
+    SyncFilter,
+    SyncResult,
+    SyncEvent,
+    SyncEngine,
+    EventHandler,
+    PaginatedMessages,
+    create_filter,
+    sync_once,
+    extract_events,
+    get_messages,
+)
+
+__all__ = [
+    # Auth
+    "AuthResult",
+    "WhoAmIResult",
+    "login",
+    "login_from_config",
+    "logout",
+    "save_session",
+    "load_session",
+    "remove_session",
+    "validate_token",
+    # Config
+    "MatrixConfig",
+    # Client
+    "MatrixClient",
+    "MatrixMessage",
+    "SendResult",
+    "quick_connect",
+    # Rooms
+    "RoomInfo",
+    "CreateRoomResult",
+    "MemberInfo",
+    "PowerLevels",
+    "create_room",
+    "join_room",
+    "leave_room",
+    "forget_room",
+    "get_joined_rooms",
+    "resolve_room_alias",
+    "get_room_info",
+    "get_room_members",
+    "invite_user",
+    "kick_user",
+    "ban_user",
+    "unban_user",
+    "set_room_name",
+    "set_room_topic",
+    # Messaging
+    "send_text",
+    "send_notice",
+    "send_emote",
+    "send_image",
+    "send_file",
+    "send_sticker",
+    "edit_message",
+    "redact_message",
+    "send_reaction",
+    "send_typing",
+    "send_read_receipt",
+    "set_fully_read",
+    # Sync
+    "SyncFilter",
+    "SyncResult",
+    "SyncEvent",
+    "SyncEngine",
+    "EventHandler",
+    "PaginatedMessages",
+    "create_filter",
+    "sync_once",
+    "extract_events",
+    "get_messages",
+    # Meta
+    "__version__",
+]