Add info cards for characters

[mkremins]

As discovered during playtesting, players need some straightforward way to view background information about a specific character. At minimum, a character's info card should probably include:

• The character's name
• The character's roles, values, curses, hooks, and other traits as we add them
• A table of information about the character's relationships with other characters
• A log of all events in which the character was involved

Later on, we'll probably also want to add info cards for other types of database entities, such as projects and events.

We can use hypertext-style links within info card text to let the player navigate the web of entities, sort of like the in-game "wiki" in Starfreighter (at the bottom right corner of the screen).