Improve /create trains and /create train command: Added schedule information and copy UUID on hover

[HB-Stratos]

I made a few changes to the /create trains and /create train debug commands.

The changes were largely motivated by my server building a relatively large and complex train network that likes to have some problems that are hard to debug. Further PRs to fix some of these bugs will likely follow.

While a large part of it was written with help of Claude Sonnet 4.5, I have verified all code manually to the best of my ability and tested all changes in game. This PR was also written by me.

Change 1:

/create train <...> nearest allows a player to use the create train command to target a single train without having to know the full UUID. As there are now two entries for input options, the code suggestion was edited such that nearest or <UUID> are displayed in game.

Change 2:

/create train schedule <...> allows a player to dump the full schedule a train currently has into the chat for debugging. This became necessary as an auto schedule assigned to a train by a station with a schedule on top can not be taken off the train and then read by the player. As such, this is the only way to understand what a train with an auto schedule is even trying to do.

_{Note that the weird printout of players seated is caused by a bug reported in #9866}

Change 3:

/create trains was amended to include a button to display the schedule for this train.

Change 4:

/create trains was extended to allow copying of the full UUID when hovering over it. This applies to all UUIDs including graph, track edge and train. When a UUID is clicked it is copied to the clipboard for further use, for example in the /create train command.

Things I came across while editing the codebase:

• Permalink The dump schedule command uses a really complex way of sending specific chat to specific places, when a for loop using sendSuccess() appears to work pretty well. It does print twice in the dev console as chat log and server chat log, but that seems acceptable.
• The custom colors are hard-coded into DumpRailwaysCommand.java link instead of being available in a public style guide. A future addition may want to extract these. I have copied the colors to TrainCommand.java and added two extra colors I needed to make it work.
• Create has a bug, the tooltip when hovering a players seated schedule condition does not show whether it is configured to be an exact match or a greater than match. This disagrees with the implementation used for liquids, items, etc. I have opened an issue regarding this as Incomplete tooltip for Schedule Condition Players Seated #9866
• with now three buttons under each train in /create trains it may be worth considering moving the teleport button to the coordinate display that is present anyways, coloring the coordinates themselves orange and making them clickable.
• The truncated UUID printing may be present in other debug commands. I did not go looking too far here. The copy on click feature should likely be extended to all of them.