rework(preview): Ask providers for hover info

Now lsp checks if client supports hover
Addresses #82

lua/symbols-outline/providers/markdown.lua

@@ -1,15 +1,19 @@
-local md_parser = require('symbols-outline.markdown')
+local md_parser = require("symbols-outline.markdown")
 
 local M = {}
 
 -- probably change this
 function M.should_use_provider(bufnr)
-    return vim.api.nvim_buf_get_option(bufnr, 'ft') == 'markdown'
+	return vim.api.nvim_buf_get_option(bufnr, "ft") == "markdown"
+end
+
+function M.hover_info(_, _, on_info)
+	on_info(nil, { contents = { kind = "markdown", contents = { "No extra information availaible!" } } })
 end
 
 ---@param on_symbols function
 function M.request_symbols(on_symbols)
-    on_symbols(md_parser.handle_markdown())
+	on_symbols(md_parser.handle_markdown())
 end
 
 return M