`UTBot: Prepare project model` action in command palette

[korifey]

If project model configuration is failed by one of the reasons:

• build folder is not create
• compile_commands.json and link_commands.json are failed to generate from CMake/Make
• source folders are not marked as src

then user have no chance to configure project.

We need explicit command in VSCode command pallete that will repeat aforementioned actions. Also we should create a special section in Troubleshooting wiki to tell user when that he is able to invoke this command.

[ladisgin]

We have UTBot: configure project command pallet. But it doesn't reconfigure project if we change CMakeLists.txt.
Probably we need add smth like UTBot: reset and configure project. That delete build, tmp directories and configure project from zero.