* Sync/Unsync decompiler widgets.
* Add multiple decompiler widgets with its own decompiler and functions.
* updateWindowTitle() in widgets for decompiler, disassembly, and hexdump.
* move building errors to the troubleshooting section
* add submodule out of sync issue to troubleshooting
* changes to get cutter section
* move common issues to user docs
* add error related to submodule not in sync
* Grammarly scan on all the docs
* update contribution guide now that common-errors is split
