Add CLI and config file options to ignore refiner, provider and subtitle ids

[getzze]

fixes #585, #752, #1018

This PR adds some CLI options:

• --ignore-refiner: can be repeated, refiner to ignore.
• --ignore-provider: can be repeated, provider to ignore.
• --extend-refiner: can be repeated, refiner to extend to the list of refiners to use.
• --extend-provider: can be repeated, provider to extend to the list of providers to use.
• --ignore-subtitles: can be repeated, subtitle id to ignore.

These can also be defined in the configuration file, so it's important to make sure the CLI options always takes precedence over the config file. This logic is implemented (and tested) in merge_extend_and_ignore_unions.

(I followed the naming of ruff, select-extend-ignore :))

[github-actions[bot]]

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File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
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core.py					323, 651-657
extensions.py
utils.py
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