feat: add ability to pass certs

[NigelGreenway]

A key feature that is missing from what I can tell is the ability to pass a cert/key. This change request is to add a cert/key via configuration based on the host. If it matches that host, then the file path for the certs/keys will be added to the request.

Changes:

• Add --cert and --key flag with file path to docs
• Add a configuration setup so the keys are only sent with the corresponding request

[NigelGreenway]

I still need to add tests and update the docs, and sort out some code that I've amended in error with formatting. Is this something that you would be interesting in?

[boltlessengineer]

Thank you for your contribution! Yes, we definitely need this feature. I can merge this PR when it is ready.
Please avoid including unnecessary code reformats ;)

[NigelGreenway]

Please find all comments resolved, and I've added docs and tests.

Linting, formatting and tests are all green 💪

[boltlessengineer]

We already have domain matching functionality in cookie_jar.lua so we can use same logic for both, but for now, I think this is fine. I might add a TODO comment here though.

rest.nvim/lua/rest-nvim/cookie_jar.lua

Lines 172 to 199 in 404a262

	local function match_cookie(url, cookie)
	local req_domain, req_path = utils.parse_url(url)
	if not req_domain then
	return false
	end
	local domain_matches = ("." .. req_domain):match(vim.pesc(cookie.domain) .. "$")
	local path_matches = req_path:sub(1, #cookie.path) == cookie.path
	if domain_matches and path_matches then
	logger.debug(
	("cookie %s with domain %s and path %s matched to url: %s"):format(
	cookie.name,
	cookie.domain,
	cookie.path,
	url
	)
	)
	else
	logger.debug(
	("cookie %s with domain %s and path %s NOT matched to url: %s"):format(
	cookie.name,
	cookie.domain,
	cookie.path,
	url
	)
	)
	end
	return domain_matches and path_matches
	end

[boltlessengineer]

LGTM. I’ll squash-merge it after adding a commit with some minor fixes.