docs: fix README URLs and add LICENSE

- Replace staging.viteplus.dev with viteplus.dev in install URLs
- Fix feedback link to point to setup-vp issues
- Add MIT LICENSE file

Author: fengmk2

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026-present, VoidZero Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -147,8 +147,8 @@ jobs:
 
 ### Install Vite+ CLI
 
-- **Linux / macOS:** `curl -fsSL https://staging.viteplus.dev/install.sh | bash`
-- **Windows:** `irm https://staging.viteplus.dev/install.ps1 | iex`
+- **Linux / macOS:** `curl -fsSL https://viteplus.dev/install.sh | bash`
+- **Windows:** `irm https://viteplus.dev/install.ps1 | iex`
 
 ### Setup
 
@@ -177,7 +177,7 @@ vp install
 
 ## Feedback
 
-If you have any feedback or issues, please [submit an issue or start a discussion](https://github.com/voidzero-dev/vite-plus-discussions).
+If you have any feedback or issues, please [submit an issue](https://github.com/voidzero-dev/setup-vp/issues).
 
 ## License