build(jenkins): jenkins build scripts for Windows and Ubuntu

scripts/jenkins-pre-build.cmd

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+:: Build script
+::   - Windows 10
+::   - Visual Studio 2019
+::   - Git
+::
+::  IMPORTANT!!!
+::    Open "x64 Native Command Tool Prompt for VS 2019" as Administrator.
+::
+
+CALL "C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\Build\vcvars64.bat"
+
+REM current dir - RPC source directory
+set VCPKG_DIR=C:\opt\vcpkg-source
+
+cd %VCPKG_DIR%
+
+REM build vcpkg
+git clone --branch 2020.11-1 https://github.com/microsoft/vcpkg.git
+cd vcpkg
+cmd /c bootstrap-vcpkg.bat
+
+REM install CPPRestSDK
+cmd /c vcpkg install cpprestsdk[websockets]:x64-windows-static