cland-contexts extension issues

[sdirix]

Bug Description:

During testing of #67 I found the following two issues:

• When switching the build configuration before a C source file was opened, e.g. immediately after clangd-contexts example generation and build.sh execution, errors are thrown in relation to the clangd language server. The language server does not recover and the frontend must be restarted
  

• When generating both the clangd-contexts example and the CMake example, the cmake example is offered as an additional target for context switching. The context switching still works, however the context bar always shows "Build configuration: NONE"
  

Additional Information

The clangd-contexts extension source can be found here.