feat: terminal theme improvemnts, file manager improvements, host manager improvements (ready for initial user testing?)

src/types/ui-types.ts

@@ -14,6 +14,8 @@ export type Host = {
   credentialId?: string;
   overrideCredentialUsername?: boolean;
   password?: string;
+  hasPassword?: boolean;
+  hasKey?: boolean;
   key?: string;
   keyPassword?: string;
   keyType?: string;