add create/edit functionality

device-app/resources/views/locations/create.blade.php

@@ -0,0 +1,17 @@
+<form method="POST" action="/devices/{{ $device->device_id }}/locations">
+    @csrf
+    <label for="room_code">room_code:</label>
+    <input type="text" id="room_code" name="room_code" value="{{old('room_code')}}" required>
+    @error('room_code')
+        <p>{{ $message }}</p>
+    @enderror
+    <br />
+    <label for="timestamp_located_since">timestamp_located_since:</label>
+    <input type="text" id="timestamp_located_since" name="timestamp_located_since"
+        value="{{old('timestamp_located_since')}}" required>
+    @error('timestamp_located_since')
+        <p>{{ $message }}</p>
+    @enderror
+    <br />
+    <input type="submit" value="Submit">
+</form>