feat(null-ls): include hover capabilities

[cristobalgvera]

Description

This change adds hover capabilitites to LunarVim based on recent added hover in null-ls.

It follows already added null-ls capabilities in order to give a well known interface to current users.

This change has no external dependencies.

The documentation was added on PR312 of the LunarVim's docs.

How Has This Been Tested?

I include it on my own configuration since a while. I decide to include in the LunarVim's one to contribute.

[kylo252]

Suggested change

	function M.list_registered(filetype)
	local registered_providers = services.list_registered_providers_names(filetype)
	return registered_providers[method] or {}
	end

[kylo252]

you also need to add a section for it in the info panel, same as the other null-ls sources, see

LunarVim/lua/lvim/core/info.lua

Lines 159 to 190 in 3166cc0

	local auto_lsp_info = make_auto_lsp_info(ft)
	local formatters_info = make_formatters_info(ft)
	local linters_info = make_linters_info(ft)
	local code_actions_info = make_code_actions_info(ft)
	local content_provider = function(popup)
	local content = {}
	for _, section in ipairs {
	M.banner,
	{ "" },
	{ "" },
	header,
	{ "" },
	lsp_info,
	{ "" },
	auto_lsp_info,
	{ "" },
	formatters_info,
	{ "" },
	linters_info,
	{ "" },
	code_actions_info,
	} do
	vim.list_extend(content, section)
	end
	return text.align_left(popup, content, 0.5)
	end

[kylo252]

Suggested change

	function M.setup(formatter_configs)
	function M.setup(hover_configs)

[kylo252]

Suggested change

	Log:debug("Registered the following hovers: " .. unpack(registered))
	Log:debug("Registered the following hover sources: " .. unpack(registered))