Add/improve actor trunk and organ description texts

[Mikolaj]

The descriptions are in field idesc of the ItemKind records in directory GameDefinition/Content/, in files ItemKindActor.hs and ItemKindOrgan.hs. Wikipedia is a good source of the biological data. The descriptions are expected to be rather concise and, more or less, justify and colour the stats.

The descriptions are displayed as part of each actor's organ menu @ and also when the cursor is on an actor in targeting mode. The descriptions are also displayed in the info ~ menu, where everything ever seen by the player is available for perusing.

Edit: the descriptions are assumed to be licensed under BSD3. This should spare all of us us any legal headaches when moving content between various free software games based on LambdaHack.

[Mikolaj]

The rudimentary ~ menu is already implemented in the game. To have full information about all items created during a game, start it with the following debug options:

Allure --dbgMsgSer --dumpInitRngs --savePrefix know --newGame 2 --gameMode crawl --knowItems

The mood of the in-game prose is proposed on the wiki, in particular at https://github.com/AllureOfTheStars/Allure/wiki/Content

Edit: a shortcut, especially for those compiling from source, has been added: make expose-lore.

[Mikolaj]

A note: let's try to avoid second person ("you") in descriptions. Let's at most use it for backstory, e.g., in scenario introductions, but not in common items, such as organs or ordinary actors.

[Mikolaj]

Now that all items except embedded items and organs have proper descriptions, closing in favour of #95 and LambdaHack/LambdaHack#153. @Peritract: thank you again, great job.