Organize Tests

[threeal]

This pull request resolves #144 by organizing tests in this project as follows:

• Remove the unused section creation test, as the behavior can be verified by running other tests.
• Rename the test modules to use lowercase names.
• Remove test names and use file names as the test names instead.
• Order tests alphabetically for better organization.
• Organize test sections in the test/assert_execute_process.cmake and test/assert.cmake modules.