Add core functionality for mobile post scheduling app

Adds necessary dependencies including axios and react-native-calendars to pnpm-lock.yaml.

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artifacts/postiz-mobile/babel.config.js

@@ -0,0 +1,6 @@
+module.exports = function (api) {
+  api.cache(true);
+  return {
+    presets: [["babel-preset-expo", { unstable_transformImportMeta: true }]],
+  };
+};