GTest exports the following targets:

• GTest::gtest
• GTest::gtest_main
• GTest::gmock
• GTest::gmock_main

This targets should also be available when adding gtest with add_subdirectory (or FetchContent), because this should behave the same way as adding GTest with find_package. So somewhere, we should add the aliases to these targets, i.e.

add_library(GTest::gtest ALIAS 

Many algorithms in Project Euler do not follow coding styles as mentioned by here, or even the standard coding guidelines.

Notes:

• A lot of inconsistencies with the solution functions (a lot of them aren't named as "solution")
• docstring inconsistencies:

>```docstring```
vs
>```
docstring``

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Is your feature request related to a problem? Please describe.

After calling child_process.spawn, I'd like to know when the child process has successfully spawned and there's no longer the possibility of an 'error' event from failing to spawn (i.e. error type # 1 in the docs for that 'error' event, e.g. EPERM, `ENOEN