Make spawn types' cooldowns separate and configurable.

[LlmDl]

  - Allow for all nation spawn and town spawn types to have individual spawn cooldowns.
    - Your previous global_town_settings.spawn_cooldown_time setting will be migrated to the new settings.
    - Closes #6224.
  - New Config Nodes: 
    - global_town_settings.spawning_cooldowns.town_spawn_cooldown_time
      - Default: 30 
      - Number of seconds that must pass before a player can use /t spawn or /res spawn.
    - global_town_settings.spawning_cooldowns.outpost_cooldown_time 
      - Default: 30 
      - Number of seconds that must pass before a player can use /t outpost.
    - global_town_settings.spawning_cooldowns.nation_member_town_spawn_cooldown_time
      - Default: 30
      - Number of seconds that must pass before a player of the same nation can use /t spawn.
    - global_town_settings.spawning_cooldowns.nation_ally_town_spawn_cooldown_time 
      - Default: 30 
      - Number of seconds that must pass before a player in an allied nation can use /t spawn.
    - global_town_settings.spawning_cooldowns.unaffiliated_town_spawn_cooldown_time
      - Default: 30
      - Number of seconds that must pass before a player who is not a member or ally of town can use /t spawn.
    - global_nation_settings.spawning_cooldowns.nation_member_nation_spawn_cooldown_time 
      - Default: 30 
      - Number of seconds that must pass before a player of the same nation can use /n spawn.
    - global_nation_settings.spawning_cooldowns.nation_ally_nation_spawn_cooldown_time
      - Default: 30
      - Number of seconds that must pass before a player allied with the nation can use /n spawn.
    - global_nation_settings.spawning_cooldowns.unaffiliated_nation_spawn_cooldown_time 
      - Default: 30 
      - Number of seconds that must pass before a player who is not a member or ally can use /n spawn.
  - Removed Config Option: global_town_settings.spawn_cooldown_time

Description:

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New Nodes/Commands/ConfigOptions:

See above

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Relevant Towny Issue ticket:

Closes #6224

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• I have tested this pull request for defects on a server.

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