Made serialization of Command optional. If command is serialized, Control (On Win/Linux) or Meta (on Mac) are not.
Example use case: You are on Windows and you set a shortcut to be Control + E. This would serialize as Command=true and Control=true. If you then run this project on Mac, you would need to press Command AND Control to activate the shortcut - which is not what is intended. Now, you can set store_command to true, and it will only serialize to Command = true (no Control serialized). On Windows, this means Control. On Mac, it means only command.
Which means that reduz' beloved style which we all became used to
will now be changed automatically to remove the first empty line.
This makes us lean closer to 1TBS (the one true brace style) instead
of hybridating it with some Allman-inspired spacing.
There's still the case of braces around single-statement blocks that
needs to be addressed (but clang-format can't help with that, but
clang-tidy may if we agree about it).
Part of #33027.
Using `clang-tidy`'s `modernize-use-default-member-init` check and
manual review of the changes, and some extra manual changes that
`clang-tidy` failed to do.
Also went manually through all of `core` to find occurrences that
`clang-tidy` couldn't handle, especially all initializations done
in a constructor without using initializer lists.
