feat: get_available_servers now accepts a filter

[kylo252]

Description

Allow get_available_servers to accept a query filter

The available keys are

• filetype (string): Only return servers with matching fileyupe

related: williamboman/mason.nvim#86

How has this been tested?

local all_servers = get_available_servers()
local js_servers = get_available_servers({ ft = "javascript" })

TODOs

• this current returns the full list of servers if the filetype query fails (regardless if the filetype is actually valid from the start)
• this should probably be used in parse_packages_from_heuristics
• we could probably use an is_valid_server(), see the test-case in 358f627

[kylo252]

@williamboman, this one will be a bit more tricky, but I think it's quite useful, see williamboman/mason.nvim#86

P.s. I've spent way too long trying to get the annotations for this in a reasonable state, but I'm not sure how you'd want it to be, so feel free to add any suggestions.

[williamboman]

P.s. I've spent way too long trying to get the annotations for this in a reasonable state, but I'm not sure how you'd want it to be, so feel free to add any suggestions.

They look good to me! I changed the signature to allow both a string as well as a list of strings, felt more natural to me to allow both variants.

this should probably be used in parse_packages_from_heuristics

Good catch! Should be easy to incorporate, will look into it

[williamboman]

LGTM! Let's look into the TODOs in later PRs. I'll wait with merge until I have your blessing @kylo252, not sure if I messed something up with my changes