feat: add built-in caching via inputs (#89)

deno.json

@@ -14,6 +14,7 @@
     "build": "deno run -A scripts/build.ts"
   },
   "imports": {
+    "@actions/cache": "npm:@actions/cache@^4.0.3",
     "@actions/core": "npm:@actions/core@^1.11.1",
     "@actions/tool-cache": "npm:@actions/tool-cache@^2.0.2",
     "@types/node": "npm:@types/node@^22.15.0",