refactor(geolocation): simplify API, defer permission checks (#1773)

examples/api/src/views/Geolocation.svelte

@@ -0,0 +1,29 @@
+<script>
+  import {
+    checkPermissions,
+    requestPermissions,
+    getCurrentPosition
+  } from '@tauri-apps/plugin-geolocation'
+
+  export let onMessage
+
+  async function getPosition() {
+    let permissions = await checkPermissions()
+    if (
+      permissions.location === 'prompt' ||
+      permissions.location === 'prompt-with-rationale'
+    ) {
+      permissions = await requestPermissions(['location'])
+    }
+
+    if (permissions.location === 'granted') {
+      getCurrentPosition().then(onMessage).catch(onMessage)
+    } else {
+      onMessage('permission denied')
+    }
+  }
+</script>
+
+<button class="btn" id="cli-matches" on:click={getPosition}>
+  Get Position
+</button>