Create intructions for using vscode

docs/using_vscode.md

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+# Using vscode
+
+## Compilation and installation
+### Prerequisites
+
+* before compilation you have to instal tools and dependencies (points 1,2,3) - https://github.com/colobot/colobot/wiki/How-to-Build-Colobot%3A-Gold-Edition-Using-MSVC
+
+### Configuring vscode
+
+* open project folder in vscode
+* install extension CMake Tools: https://marketplace.visualstudio.com/items?itemName=ms-vscode.cmake-tools
+* install extensnion ms-vscode.cpptools: https://marketplace.visualstudio.com/items?itemName=ms-vscode.cpptools
+* on the status line at the bottom you can choose cmake configuration and compiler
+
+### Adding cmake settings:
+* create folder .vscode if there is none. Inside that folder create file settings.json with the following content:
+```json
+{
+    "cmake.configureSettings": {
+            "name": "x64-Debug",
+            "generator": "Ninja",
+            "configurationType": "Debug",
+            "inheritEnvironments": [ "msvc_x64_x64" ],
+            "CMAKE_TOOLCHAIN_FILE":{input path to toolchain}
+            "VCPKG_TARGET_TRIPLET": "x64-windows-static",
+            "BOOST_STATIC": "1",
+            "GLEW_STATIC": "1",
+            "MSVC_STATIC": "1"
+        },
+    "cmake.buildDirectory": "${workspaceFolder}\\out\\build\\x64-Debug",
+    "cmake.installPrefix": "${workspaceFolder}\\out\\build\\x64-Debug",
+    "cmake.generator": "ninja"
+}
+```
+
+### Compilation and installation
+* Open cmake extension in the left menu
+* click on 'configure all projects'
+* on the status line at the bottom click compilation target and choose install
+* click compile
+* click launch
+
+If you have any problems create an issue or talk to us on our Discord channel: https://discord.gg/TRCJRc