feature request: hhast-lint option to skip certain linters in as-you-type mode

[ssandler]

When linting in as-you-type mode with the LSP, performance is a huge concern, more so than it is in CLI mode where we may be executing the linter in a continuous integration environment. We'd like to be able to have certain lint rules only run in CLI mode, which we currently do by setting an environment variable and checking it in the lint rule code. Making this a hhast-lint setting could help separate these use cases.

[fredemmott]

This could involve:

• separate lists of defaults for as-you-type vs CLI
• separate json config files for as-you-type vs CLI
• interface markers on the linters to indicate if they're suitable for as-you-type
• ... some combination of the above

[fredemmott]

interface markers on the linters to indicate if they're suitable for as-you-type

@ssandler how well do you think this would work as a per-linter thing rather than per-project?

[ssandler]

I think that would work quite well!