[Proposal] TYPO3 Module Configuration

moduleconf.php

<?php

$TYPO3_CONF_VARS = [
	'modules' => [
		'direct_mail' => [
			'configuration' => [
				'showInWorkspaces' => true,
				'navFrameRoute' => 'modules/web/pagetree',
				'icon' => 'EXT:somewhere/Resources/Public/Icons/moduleIcon.svg',
				'labels' => [
					'module' => 'LLL:EXT:someotherext/locallang_mod.xml:moduleName',
					'summary' => 'LLL:EXT:someotherext/locallang_mod.xml:summary',
					'description' => 'LLL:EXT:someotherext/locallang_mod.xml:description',
				]
			],
			'subModules' => [
				'send_direct_mail' => [
					'configuration' => [
						'roles' => [
							'sender',
						],
						'showInWorkspaces' => true,
						'inheritNavFrame' => true, //arguably, we could assume "true" as default so you need to switch it OFF
						'moduleRoute' => 'modules/web/page', //it'd be clever to build this automatically so it could be omitted
						'icon' => 'EXT:somewhereELse/Resources/Public/Icons/moduleIcon.svg',
						'labels' => [
							'module' => 'LLL:EXT:someotherext/locallang_mod.xml:moduleName',
							'summary' => 'LLL:EXT:someotherext/locallang_mod.xml:summary',
							'description' => 'LLL:EXT:someotherext/locallang_mod.xml:description',
						]
					],
					'subMenuPosition' => 'left', // could be "top", in which case it'd create a tabbed module
					'subModules' => [
						'neatHu' => [
							'configuration' => [
								'roles' => [
									'sender',
								],
								'showInWorkspaces' => true,
								'inheritNavFrame' => true,
								'moduleRoute' => 'modules/web/page',
								'icon' => 'EXT:somewhereELse/Resources/Public/Icons/moduleIcon.svg',
								'labels' => [
									'module' => 'LLL:EXT:someotherext/locallang_mod.xml:moduleName',
									'summary' => 'LLL:EXT:someotherext/locallang_mod.xml:summary',
									'description' => 'LLL:EXT:someotherext/locallang_mod.xml:description',
								]
							],
						],
					]
				],
				'recipient' => [
					'configuration' => [
						'roles' => [
							'recipientListCreator',
						],
						'showInWorkspaces' => true,
						'inheritNavFrame' => true,
						'moduleRoute' => 'modules/web/page',
						'icon' => 'EXT:somewhereELse/Resources/Public/Icons/moduleIcon.svg',
						'labels' => [
							'module' => 'LLL:EXT:someotherext/locallang_mod.xml:moduleName',
							'summary' => 'LLL:EXT:someotherext/locallang_mod.xml:summary',
							'description' => 'LLL:EXT:someotherext/locallang_mod.xml:description',
						]
					],
				],
				'statistics' => [
					'configuration' => [
						'roles' => [
							'sender',
							'statistics'
						],
						'showInWorkspaces' => true,
						'inheritNavFrame' => true,
						'moduleRoute' => 'modules/web/page',
						'icon' => 'EXT:somewhereELse/Resources/Public/Icons/moduleIcon.svg',
						'labels' => [
							'module' => 'LLL:EXT:someotherext/locallang_mod.xml:moduleName',
							'summary' => 'LLL:EXT:someotherext/locallang_mod.xml:summary',
							'description' => 'LLL:EXT:someotherext/locallang_mod.xml:description',
						]
					],
				]
			]
		]
	]
];

Please consider that stacking submodules in submodules could come to the conclusion that the hirachy is endlessly stackable.