feat: Resolve additional environment variables for entries in the settings.json file

[juanmor40]

Is there an existing request for this?

• I have searched the existing issues

I have tried the Pre-Release of the extension.

• Feature is not present in the latest Pre-Release

Feature Request

For example, when setting "fortran.linter.compilerPath":"${env:HOME}/.local/bin/gfortran", the variable HOME is not expanded/resolved.

It seems that the string is not resolved in LinterSettings,

as it is done for the fortls.path, for example,

It would be great if compilerPath, as well as linter.includePaths (if not already done elsewhere).

Thank you

I initially discussed the issue in Fortran Discourse (https://fortran-lang.discourse.group/t/modern-fortran-support-for-environment-variables-in-settings-json/10677)