style: configure deno fmt to use single quotes

- Add singleQuote: true to deno.json fmt configuration
- Reformat all files with single quotes using deno fmt

ts/snmp/index.ts

@@ -4,7 +4,7 @@
  */
 
 // Re-export all public types
-export type { IUpsStatus, IOidSet, TUpsModel, ISnmpConfig } from './types.ts';
+export type { IOidSet, ISnmpConfig, IUpsStatus, TUpsModel } from './types.ts';
 
 // Re-export the SNMP manager class
-export { NupstSnmp } from './manager.ts';
+export { NupstSnmp } from './manager.ts';