Initial work on adding passkeys

Mostly starting to get some javascript set up

resources/js/auth.js

@@ -0,0 +1,36 @@
+class Auth {
+  constructor() {}
+
+  async createCredentials() {
+    const publicKeyCredentialCreationOptions = {
+      challenge: Uint8Array.from(
+        'randomStringFromServer',
+        c => c.charCodeAt(0)
+      ),
+      rp: {
+        id: 'jonnybarnes.localhost',
+        name: 'JB',
+      },
+      user: {
+        id: Uint8Array.from(
+          'UZSL85T9AFC',
+          c => c.charCodeAt(0)
+        ),
+        name: 'jonny@jonnybarnes.uk',
+        displayName: 'Jonny',
+      },
+      pubKeyCredParams: [{alg: -7, type: 'public-key'}],
+      // authenticatorSelection: {
+      //   authenticatorAttachment: 'cross-platform',
+      // },
+      timeout: 60000,
+      attestation: 'direct'
+    };
+
+    return await navigator.credentials.create({
+      publicKey: publicKeyCredentialCreationOptions
+    });
+  }
+}
+
+export { Auth };