Cleanup Lua plugin implementation.

* Move the UI code out of the plugin logic.
* Add types where needed.
* Move into game package.
* Improve error handling.
* Simplify settings behavior.
* Don't load disabled plugins.
* Remove knowledge of non-base plugins from game generation.

Fixes https://github.com/Khopa/dcs_liberation/issues/311

qt_ui/windows/settings/plugins.py

@@ -0,0 +1,71 @@
+from PySide2.QtCore import Qt
+from PySide2.QtWidgets import (
+    QCheckBox,
+    QGridLayout,
+    QGroupBox,
+    QLabel, QVBoxLayout,
+    QWidget,
+)
+
+from game.plugins import LuaPlugin, LuaPluginManager
+
+
+class PluginsBox(QGroupBox):
+    def __init__(self) -> None:
+        super().__init__("Plugins")
+
+        layout = QGridLayout()
+        layout.setAlignment(Qt.AlignTop)
+        self.setLayout(layout)
+
+        for row, plugin in enumerate(LuaPluginManager.plugins()):
+            if not plugin.show_in_ui:
+                continue
+
+            layout.addWidget(QLabel(plugin.name), row, 0)
+
+            checkbox = QCheckBox()
+            checkbox.setChecked(plugin.enabled)
+            checkbox.toggled.connect(plugin.set_enabled)
+            layout.addWidget(checkbox, row, 1)
+
+
+class PluginsPage(QWidget):
+    def __init__(self) -> None:
+        super().__init__()
+
+        layout = QVBoxLayout()
+        layout.setAlignment(Qt.AlignTop)
+        self.setLayout(layout)
+
+        layout.addWidget(PluginsBox())
+
+
+class PluginOptionsBox(QGroupBox):
+    def __init__(self, plugin: LuaPlugin) -> None:
+        super().__init__(plugin.name)
+
+        layout = QGridLayout()
+        layout.setAlignment(Qt.AlignTop)
+        self.setLayout(layout)
+
+        for row, option in enumerate(plugin.options):
+            layout.addWidget(QLabel(option.name), row, 0)
+
+            checkbox = QCheckBox()
+            checkbox.setChecked(option.enabled)
+            checkbox.toggled.connect(option.set_enabled)
+            layout.addWidget(checkbox, row, 1)
+
+
+class PluginOptionsPage(QWidget):
+    def __init__(self) -> None:
+        super().__init__()
+
+        layout = QVBoxLayout()
+        layout.setAlignment(Qt.AlignTop)
+        self.setLayout(layout)
+
+        for plugin in LuaPluginManager.plugins():
+            if plugin.options:
+                layout.addWidget(PluginOptionsBox(plugin))