feat: setup pre-commit and handle linting errors #129

Job	Run time
Check current version / macos-latest (release)	6m 46s
Check current version / windows-latest (release)	11m 34s
Coverage report / test-coverage-internal	7m 58s
Check NN version / macos-latest (R 4.3.1, 2023-10-25)	7m 49s
Check current version / ubuntu-latest (devel)	7m 16s
Check NN version / macos-latest (R 4.4.1, 2024-08-06)	6m 49s
Check current version / ubuntu-latest (release)	8m 51s
Check NN version / windows-latest (R 4.3.1, 2023-10-25)	16m 5s
Check current version / ubuntu-latest (oldrel-1)	7m 43s
Check NN version / windows-latest (R 4.4.1, 2024-08-06)	11m 27s
Check NN version / ubuntu-latest (R 4.3.1, 2023-10-25)	25m 50s
Check NN version / ubuntu-latest (R 4.4.1, 2024-08-06)	20m 23s
Megalinter / MegaLinter	3m 17s
Pkgdown site / pkgdown	3m 8s
	2h 24m 56s

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