Show wallet status in console

Property definitions

github $ GithubWallet :: show_status
	# Show wallet status in console
	fun show_status(no_color: nullable Bool) do
		no_color = no_color or else false

		if tokens.is_empty then
			print "Wallet is empty"
			return
		end
		print "Wallet ({tokens.length} tokens):"
		for token in tokens do
			var status
			if check_token(token) then
				status = if no_color then "OK" else "OK".green
			else
				status = if no_color then "KO" else "KO".red
			end
			print " * [{status}] {token}"
		end
	end
lib/github/wallet.nit:154,2--172,4