feat: implement workspace management and member invitations

- Added tenant API for managing workspaces, including listing, creating, and inviting members.
- Introduced new models for organizations, workspaces, and workspace memberships in the backend.
- Created frontend components for workspace administration, allowing users to manage workspaces and invite members.
- Updated document listing to support workspace-specific filtering.
- Implemented account settings page for user profile management and password changes.
- Added end-to-end tests for workspace administration and dashboard functionalities.

backend/app/schemas/document.py

@@ -22,6 +22,7 @@ class DocumentCreate(BaseModel):
     template_id: str | None = None
     stead_id: str | None = None
     parent_page_id: str | None = None
+    workspace_id: int | None = None
 
 
 class DocumentUpdate(BaseModel):
@@ -30,6 +31,7 @@ class DocumentUpdate(BaseModel):
     starred: bool | None = None
     stead_id: str | None = None
     parent_page_id: str | None = None
+    workspace_id: int | None = None
 
 
 class ShareRequest(BaseModel):
@@ -53,6 +55,7 @@ class DocumentResponse(BaseModel):
     owner_id: int | None = None
     visibility: Visibility = "private"
     members: list[DocumentMember] = Field(default_factory=list)
+    workspace_id: int | None = None
 
 
 class DocumentVersionResponse(BaseModel):