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/00_commitinfo_data.ts

@@ -4,5 +4,5 @@
 export const commitinfo = {
   name: '@serve.zone/nupst',
   version: '3.1.2',
-  description: 'Node.js UPS Shutdown Tool for SNMP-enabled UPS devices'
-}
+  description: 'Node.js UPS Shutdown Tool for SNMP-enabled UPS devices',
+};