fetch_package

[JaeseungYeom]

This PR is exclusively on cmake

• Replacing FindCppLogger and FindGotcha, which are cmake FetchContent wrappers with fetch_package utility function.
• Fixed outdated import config input files
• Changed the namespace from DYAD:: to dyad::

Currently waiting for the PRs to be merged at gotcha and cpp-logger repos.

• Fix cmake variable name mismatches llnl/cpp-logger#27 (comment)
• Remove empty nested dir that causes build error with FetchContent llnl/GOTCHA#172 (comment)

Then, I will replace git url and tag used in fetch_package to the latest in each repo.

[JaeseungYeom]

I am merging this as is with dependency repo addresses redirected to my fork rather than waiting for the fixes to be applied at the source repos. I will change the fork addresses to the original addresses later.