feat(moderation): handle ban and kick notifications

[tintinhamans]

• Handle websocket moderation action message 46 for bans and kicks.
• Display the server-provided moderation reason.
• Present consistent Banned and Kicked dialogs with Discord and Close actions.
• Direct players to Discord for more information or support.
• Tear down the online session and return the player to the main menu.
• Handle bans detected during login and background token refresh.
• Normalize moderation reasons and safely reject malformed UTF-8.

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The accompanying server PR sends a moderation message before disconnecting a banned or kicked player. This lets the client distinguish moderation actions from connection issues and also provides them with a Discord link for questions or appeals.

Unpatched clients will not display the moderation reason, but the server still disconnects them/denies login as before.

Related: GeneralsOnlineDevelopmentTeam/Services#49

[github-actions]

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