feat: host lock api so a plugin can load hosts from a config file (#1581)

src/types/index.ts

@@ -37,6 +37,13 @@ export interface JumpHost {
   hostId: number;
 }
 
+/** The plugin that manages a host, from ctx.hosts.locks. */
+export interface HostLock {
+  pluginId: string;
+  pluginName: string;
+  note: string | null;
+}
+
 export type Host = {
   id: number;
   name: string;
@@ -116,6 +123,8 @@ export type Host = {
   ownerUsername?: string;
   /** A read-only copy of a host shared with the linked account. */
   sharedCopy?: boolean;
+  /** Set when a plugin manages this host: read only, pins and order still work. */
+  lock?: HostLock;
   /** Desktop only: kept on this device, never synced to the server. */
   localOnly?: boolean;