[Feature] Add weather.set <name> console command (naming consistency with weather.* family)

[lextpf]

Problem statement

The weather command family is weather.intensity, weather.next, weather.random - but the direct
setter for weather state is registered as time.weather (ConsoleCommands.cpp:3565). This breaks the
user's mental model: weather setters live under weather.* everywhere except the most important
one. Users hunting for "how do I set the weather" reasonably type weather.set Clear and get
"unknown command". The mismatch is also visible in tab completion: typing weather. does not
surface the setter.

Suggested implementation

Add a parallel registration block right after the weather.random registration at ~line 3607:

m_Registry.Register(
"weather.set",
"<name> - set weather state (alias of time.weather)",
[makeContext](auto args, Console&)
{
  CommandContext ctx = makeContext();
  (void)Cmd_TimeWeather(args, ctx);  // intentional: shared handler
},
{"weather"},
[](std::size_t argIndex) -> std::vector<std::string>
{
  // Copy the tab-completion body from time.weather's registration,
  // OR factor both into a single named lambda above the registration block.
});

Proposed solution

Add weather.set as a thin alias to Cmd_TimeWeather. Both commands continue to work (no
breaking change). Tab completion for the new alias should provide the same state-name suggestions
that time.weather already provides. The existing tab-completion lambda at
ConsoleCommands.cpp:3574-3583 can be reused.

Alternatives considered

Not applicable - this approach is simple

Scope

Not applicable - the scope is clear

Pre-submission checklist

• I searched existing issues and this proposal is not a duplicate.
• This is a user-facing capability or improvement and not a purely internal task.