Misc clang-tidy fixes, and added a .clang-tidy config file

[seanm]

This fixes some clang-tidy warnings.

Some were fixed automatically by the tool.

Some were fixed manually by me after the tool warned about them.

I've added a clang-tidy config file that results in no warnings (because of my fixes and disabling of other warning options.)

[ZedThree]

It looks like the failing tests timed out -- might be the perennial remote test issues?

[WardF]

It looks like the failing tests timed out -- might be the perennial remote test issues?

Quite possible; let me take a closer look :).

[WardF]

@DennisHeimbigner I am reviewing this but before I sign off on it, I notice a couple small changes to files in libnczarr/. I know you're working on a major refactor, do the changes in these files interfere?

[DennisHeimbigner]

@DennisHeimbigner I am reviewing this but before I sign off on it, I notice a couple small changes to files in libnczarr/. I know you're working on a major refactor, do the changes in these files interfere?

They look benign to me. Go ahead.

[WardF]

@DennisHeimbigner I am reviewing this but before I sign off on it, I notice a couple small changes to files in libnczarr/. I know you're working on a major refactor, do the changes in these files interfere?

They look benign to me. Go ahead.

Thanks, @DennisHeimbigner !