Structure and test refactor

[Eathox]

Split most structs into their own files

[github-actions]

Test Results

  1 files  ±0    4 suites  ±0   0s ⏱️ ±0s
73 tests +5  73 ✔️ +5  0 💤 ±0  0 ❌ ±0 

Results for commit 92b6e57. ± Comparison against base commit b01fdac.

This pull request removes 59 and adds 64 tests. Note that renamed tests count towards both.

input::tests_input ‑ duplicate_facts
input::tests_input ‑ duplicate_queries
input::tests_input ‑ empty_facts
input::tests_input ‑ empty_queries
input::tests_input ‑ error_double_facts
input::tests_input ‑ error_double_queries
input::tests_input ‑ error_empty
input::tests_input ‑ error_from_file_non_exist
input::tests_input ‑ error_no_facts
input::tests_input ‑ error_no_queries
…

input::sanitize_lines::tests::remove_comment ‑ mixed
input::sanitize_lines::tests::remove_comment ‑ no_comment
input::sanitize_lines::tests::remove_comment ‑ only_comment
input::sanitize_lines::tests::remove_spaces ‑ mixed
input::sanitize_lines::tests::remove_spaces ‑ no_whitespace
input::sanitize_lines::tests::remove_spaces ‑ only_whitespace
input::sanitize_lines::tests::sanitize_lines ‑ empty_lines
input::sanitize_lines::tests::sanitize_lines ‑ empty_lines_at_end
input::sanitize_lines::tests::sanitize_lines ‑ every_other_empty
input::sanitize_lines::tests::sanitize_lines ‑ example_input
…

♻️ This comment has been updated with latest results.