Add --selector option for ruff rule

[InSyncWithFoo]

There are multiple kinds of rule selectors:

[tool.ruff.lint]
select = [
	"ALL",     # All codes
	"Q000",    # Full code
	"TCH001",  # Redirected code
	"ANN0",    # Prefix
	"UP",      # Linter
	"E",       # Category
	"T"        # Cross-linter (legacy)
]

Out of all selectors above, only Q000 is query-able using ruff rule. Thus, an informational popup like this can not be shown for the rest:

ruff rule should accept a --selector option that, when enabled, would cause Ruff to output a list of selected rules, similar to how ruff config handles a subkey.

[MichaReiser]

I don't think this is necessarily the scope of this command. Maybe a ruff rule list but not sure

[InSyncWithFoo]

I ended up using ruff check --show-settings --isolated --select SEL. One drawback is that I have to check whether a selector is a full code or not on my own (using length and/or known code list), which leads to unwanted results for redirected codes.