fix: mason help make doesn't show command line args in help description

[jolexxa]

Description

Running mason help make doesn't list the args that the make command takes. This is probably a small, unfortunate side effect of the intended behavior with bricks being subcommands. Instead, it outputs the following in a project without any bricks:

Generate code using an existing brick template.

Usage: mason make <subcommand> [arguments]
-h, --help    Print this usage information.

Run "mason help" to see global options.

Steps To Reproduce
mason help make

Expected Behavior
The following:

Generate code using an existing brick template.

Usage: mason make [arguments]
-h, --help           Print this usage information.
-c, --config-path    Path to config json file containing variables.
-o, --output-dir     Directory where to output the generated code.
                     (defaults to ".")

Run "mason help" to see global options.

Additional Context

The problem seems to reside with the structure of the subcommands here:

mason/lib/src/commands/make.dart

Lines 48 to 65 in eef7d44

	class _MakeCommand extends MasonCommand {
	_MakeCommand(this._brick, {Logger? logger}) : super(logger: logger) {
	argParser
	..addOption(
	'config-path',
	abbr: 'c',
	help: 'Path to config json file containing variables.',
	)
	..addOption(
	'output-dir',
	abbr: 'o',
	help: 'Directory where to output the generated code.',
	defaultsTo: '.',
	);
	for (final arg in _brick.vars) {
	argParser.addOption(arg);
	}
	}

Because subcommands are only defined for bricks that have been found earlier, it is omitting the flags from the command altogether which is preventing the args package from generating accurate help:

mason/lib/src/commands/make.dart

Lines 16 to 26 in eef7d44

	class MakeCommand extends MasonCommand {
	/// {@macro make_command}
	MakeCommand({Logger? logger}) : super(logger: logger) {
	try {
	for (final brick in bricks) {
	addSubcommand(_MakeCommand(brick, logger: logger));
	}
	} catch (e) {
	_exception = e;
	}
	}

I would have submitted a pull request, but I wasn't sure how to do this as this without breaking the flags for each brick subcommand. If you'd like help, feel free to point me in the right direction and I'll see what I can do. 😅