save sensor data as json file

pubspec.lock

@@ -75,6 +75,30 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  http:
+    dependency: transitive
+    description:
+      name: http
+      sha256: b9c29a161230ee03d3ccf545097fccd9b87a5264228c5d348202e0f0c28f9010
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.2"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "2aa08ce0341cc9b354a498388e30986515406668dbcc4f7c950c3e715496693b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.2"
+  intl:
+    dependency: "direct main"
+    description:
+      name: intl
+      sha256: "00f33b908655e606b86d2ade4710a231b802eec6f11e87e4ea3783fd72077a50"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.20.1"
   leak_tracker:
     dependency: transitive
     description:
@@ -192,6 +216,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.2"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
   vector_math:
     dependency: transitive
     description:
@@ -208,6 +240,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "14.2.5"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: cd3543bd5798f6ad290ea73d210f423502e71900302dde696f8bff84bf89a1cb
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
 sdks:
   dart: ">=3.5.4 <4.0.0"
   flutter: ">=3.18.0-18.0.pre.54"