Android Support (#166)

1. Add vpnservice tauri plugin for android.
2. add workflow for android.
3. Easytier Core support android, allow set tun fd.

tauri-plugin-vpnservice/rollup.config.js

@@ -0,0 +1,31 @@
+import { readFileSync } from 'fs'
+import { join } from 'path'
+import { cwd } from 'process'
+import typescript from '@rollup/plugin-typescript'
+
+const pkg = JSON.parse(readFileSync(join(cwd(), 'package.json'), 'utf8'))
+
+export default {
+  input: 'guest-js/index.ts',
+  output: [
+    {
+      file: pkg.exports.import,
+      format: 'esm'
+    },
+    {
+      file: pkg.exports.require,
+      format: 'cjs'
+    }
+  ],
+  plugins: [
+    typescript({
+      declaration: true,
+      declarationDir: `./${pkg.exports.import.split('/')[0]}`
+    })
+  ],
+  external: [
+    /^@tauri-apps\/api/,
+    ...Object.keys(pkg.dependencies || {}),
+    ...Object.keys(pkg.peerDependencies || {})
+  ]
+}