fix(codelldb): use vim.fn.exepath for command (#51)

Mason.nvim utilizes symlinks to organize package files. On Windows
symlink support is complicated and so mason chooses to use .cmd script
files to simplify things. Setting "command" to "codelldb" will only
look for files with the name "codelldb", i.e. it will not find
"codelldb.cmd".

This commit changes "command" to use vim.fn.exepath() which seems to
find any executable file with an equivalent stem. This means it will
find both files "codelldb" and "codelldb.cmd".

lua/mason-nvim-dap/mappings/adapters.lua

@@ -63,13 +63,14 @@ M.codelldb = {
 	type = 'server',
 	port = '${port}',
 	executable = {
-		command = 'codelldb',
+		command = vim.fn.exepath('codelldb'),
 		args = { '--port', '${port}' },
 	},
 }
 if vim.fn.has('win32') == 1 then
 	M.codelldb.executable.detached = false
 end
+
 M.mix_task = {
 	type = 'executable',
 	command = 'elixir-ls-debugger', -- https://github.com/williamboman/mason.nvim/blob/d97579ccd5689f9c6c365e841ea99c27954112ec/lua/mason-registry/elixir-ls/init.lua#L26