Modernize MuonDet
- prefer pragma once
- remove redundant inline specifiers
- avoid redundant copying of data
- remove rendundant parathesis
- add const
- remove redundant this->
- prefer std::abs over fabs
- prefer range based loops
- limit scope of variable declarations
- prefer direct member initialization
- prefer anonymous namespaces over static
- prefer fmt::format over ostrstream
- remove redundant data member