feat: add access control to channels with various modes

- Introduced AccessMode enum to define channel access levels: Public, PasswordProtected, AccountRequired, and OwnerOnly.
- Updated Channel and ProgrammingBlock entities to include access_mode and access_password_hash fields.
- Enhanced create and update channel functionality to handle access mode and password.
- Implemented access checks in channel routes based on the defined access modes.
- Modified frontend components to support channel creation and editing with access control options.
- Added ChannelPasswordModal for handling password input when accessing restricted channels.
- Updated API calls to include channel and block passwords as needed.
- Created database migrations to add access_mode and access_password_hash columns to channels table.

k-tv-frontend/app/(main)/dashboard/page.tsx

@@ -107,9 +107,17 @@ export default function DashboardPage() {
     name: string;
     timezone: string;
     description: string;
+    access_mode?: import("@/lib/types").AccessMode;
+    access_password?: string;
   }) => {
     createChannel.mutate(
-      { name: data.name, timezone: data.timezone, description: data.description || undefined },
+      {
+        name: data.name,
+        timezone: data.timezone,
+        description: data.description || undefined,
+        access_mode: data.access_mode,
+        access_password: data.access_password,
+      },
       { onSuccess: () => setCreateOpen(false) },
     );
   };
@@ -123,6 +131,8 @@ export default function DashboardPage() {
       schedule_config: { blocks: ProgrammingBlock[] };
       recycle_policy: RecyclePolicy;
       auto_schedule: boolean;
+      access_mode?: import("@/lib/types").AccessMode;
+      access_password?: string;
     },
   ) => {
     updateChannel.mutate(