Added README-WIN64.md

Signed-off-by: Maxim Logaev <maxlogaev@proton.me>

README-WIN64.md

@@ -0,0 +1,46 @@
+![Dino (WIN64)](https://dino.im/img/readme_header.svg)
+=======
+
+![screenshots](https://dino.im/img/screenshot-main.png)
+
+Build on Windows (x86_64)
+------------
+- Install and configure the [MSYS2](https://www.msys2.org/) package;
+- Go to `MINGW64` environment;
+- Clone project:
+    ```sh
+    git clone https://github.com/mxlgv/dino && cd dino
+    ```
+- Run the script to install dependencies:
+    ```sh
+    ./build-win64.sh --prepare
+    ```
+- Start the build (the builded distribution is available in the `dist-win64` folder):
+    ```sh
+    ./build-win64.sh
+    ```
+Note: the build script has some other options, their description can be found using the `--help`.
+
+Resources
+---------
+- Check out the [Dino website](https://dino.im).
+- Join our XMPP channel at `chat@dino.im`.
+- The [wiki](https://github.com/dino/dino/wiki) provides additional information.
+
+License
+-------
+    Dino - Modern Jabber/XMPP Client using GTK+/Vala
+    Copyright (C) 2016-2023 Dino contributors
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.