add strip and lto options
use zig native backend and linker in debug mode

test is still not compiling, look into it

The test step runs all the test, they currently are all failing
this would be fixed in a future commit

The tool step installs all the lmdb binary tools

Rename some varibles to make their intent clear

The step currently isn't robust but will fix it soon
check if addIncludePath is available else use addIncludeDir

don't set preferred mode to allow library users to specify optimize mode

always translate the headers in debug mode

from discussions on discord step dependencies are run concurrently
so when create_testdb is run as a dependency of install-test it is
usually run early, my assumption is because it performs a simple
operation

to fix this I made the make fn of create_testdb the make of the
install-step, this ensures that is is only run after all dependencies
have runned

another way to go would be

```zig
    const install_test_step = b.step("test", "install testdb");
    const create_testdb_step = create_testdb.create_testdb(b);
    install_test_step.dependOn(create_testdb_step);
    create_testdb_step.dependOn(create_test_step);

```
as was suggested by @kprotty on discord but I chose the solution
in this commit because it has the benefit that it is simple
and it won't show up in `zig build` so that users don't just run
the `create_testdb` step without actually installing the test

test 3 and 5 panic with illegal instruction when built with -fsanitize-c

And don't use lld on macos

pass -D_DARWIN_C_SOURCE to macos builds, from my reading online this
macro defines some legacy typedefs from BSD that are still lingering
in macos headers