STM32 BluePill template project for STM32CubeIDE with Standard Peripherial Library (SPL) v3.6.1.
Install STM32CubeIDE
File -> Open Project from File System... -> Directory -> Finish
The project will appear in your Project Explorer. Rename it.
Right Click -> Rename... -> Update references ✓ -> OK
The .ioc file added for reference where you might describe pinout, peripherials, timings, interrupts, etc. But just for reference. Do not use 'Generate Code' button. If you want to hide 'Code-generation needed' notification, delete isbadioc=true string from file or change it to false.