feat(shell): support opening URLs on mobile (#1319)

* feat(shell): support opening URLs on mobile

closes #595

* Update and rename StorePlugin.swift to ShellPlugin.swift

* unwrap

* fix func name (ios)

* use undeprecated func if avail

---------

Co-authored-by: fabianlars <fabianlars@fabianlars.de>

plugins/shell/ios/Package.resolved

@@ -0,0 +1,16 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "SwiftRs",
+        "repositoryURL": "https://github.com/Brendonovich/swift-rs",
+        "state": {
+          "branch": null,
+          "revision": "b5ed223fcdab165bc21219c1925dc1e77e2bef5e",
+          "version": "1.0.6"
+        }
+      }
+    ]
+  },
+  "version": 1
+}

plugins/shell/ios/Package.swift

@@ -0,0 +1,33 @@
+// swift-tools-version:5.3
+// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: MIT
+
+import PackageDescription
+
+let package = Package(
+    name: "tauri-plugin-shell",
+    platforms: [
+        .iOS(.v13),
+    ],
+    products: [
+        // Products define the executables and libraries a package produces, and make them visible to other packages.
+        .library(
+            name: "tauri-plugin-shell",
+            type: .static,
+            targets: ["tauri-plugin-shell"]),
+    ],
+    dependencies: [
+        .package(name: "Tauri", path: "../.tauri/tauri-api")
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages this package depends on.
+        .target(
+            name: "tauri-plugin-shell",
+            dependencies: [
+                .byName(name: "Tauri")
+            ],
+            path: "Sources")
+    ]
+)

plugins/shell/ios/Sources/ShellPlugin.swift

@@ -0,0 +1,34 @@
+// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: MIT
+
+import Foundation
+
+import SwiftRs
+import Tauri
+import UIKit
+import WebKit
+
+class ShellPlugin: Plugin {
+
+    @objc public func open(_ invoke: Invoke) throws {
+        do {
+            let urlString = try invoke.parseArgs(String.self)
+            if let url = URL(string: urlString) {
+                if #available(iOS 10, *) {
+                    UIApplication.shared.open(url, options: [:])
+                } else {
+                    UIApplication.shared.openURL(url)
+                }
+            }
+            invoke.resolve()
+        } catch {
+            invoke.reject(error.localizedDescription)
+        }
+    }
+}
+
+@_cdecl("init_plugin_shell")
+func initPlugin() -> Plugin {
+  return ShellPlugin()
+}