Each and every Qt Creator source code found in https://download.qt.io/official_releases/qtcreator should have all those steps through which it was built, separate document for each platform.
As I have searched the entire Internet for the steps/commands/modules/libraries/etc required to build the Qt Creator on windows with MSVC 2015/2017 compilers but I did not find and could not successfully build the Qt Creator.
Once I built it by removing those plugins which were giving me errors but then the Qt creator did not functioned like the pre-built one. This is driving me crazy! I wonder why the building steps are kept secret and not released to the public!