Handle more property types.

The fmt library happily accepts std::string without
any conversions.

remove old function/complete replace of getNumberOfElementTypes()

tiny change

add getNumElemType function based on ordered map

remove old function/complete replace of getNumberOfElementTypes()

tiny change

make all number of element type maps const references

add missing auto

Most of the current .clang-tidy contained checks:
google-explicit-constructor
google-readability-braces-around-statements
modernize-loop-convert
modernize-use-default-member-init
modernize-use-emplace
modernize-use-using
readability-braces-around-statements
readability-else-after-return
readability-named-parameter
*readability-namespace-comments
*readability-inconsistent-*
readability-redundant-member-init
readability-simplify-boolean-expr
readability-string-compare
*explicit-conversions*

Either by renaming or removing the variable or adding
an extra scope to the top variable.

CPPCheck warning type: shadowVar.

Only in ERR/WARN/INFO/DBUG/OGS_FATAL and similar, not in
formatted output like xml files.

Now includes the copyright message and the version info with git hash.

New versions of logog do not have an implicit ; after the macros.

Clang format run on near-the-header lines.

Happy New Year