feat(process): add plugin (#348)

plugins/process/guest-js/index.ts

@@ -0,0 +1,45 @@
+// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: MIT
+
+/**
+ * Perform operations on the current process.
+ * @module
+ */
+
+import { invoke } from "@tauri-apps/api/tauri";
+
+/**
+ * Exits immediately with the given `exitCode`.
+ * @example
+ * ```typescript
+ * import { exit } from 'tauri-plugin-process-api';
+ * await exit(1);
+ * ```
+ *
+ * @param code The exit code to use.
+ * @returns A promise indicating the success or failure of the operation.
+ *
+ * @since 1.0.0
+ */
+async function exit(code = 0): Promise<void> {
+  return invoke("plugin:process|exit", { code });
+}
+
+/**
+ * Exits the current instance of the app then relaunches it.
+ * @example
+ * ```typescript
+ * import { relaunch } from 'tauri-plugin-process-api';
+ * await relaunch();
+ * ```
+ *
+ * @returns A promise indicating the success or failure of the operation.
+ *
+ * @since 1.0.0
+ */
+async function relaunch(): Promise<void> {
+  return invoke("plugin:process|restart");
+}
+
+export { exit, relaunch };