Add pronoun tags for actions.

[seisatsu]

Add pronoun tags that work on decoration actions. For example, currently an item may be decorated with "sees their reflection in the mirror." but this will allow "sees %their% reflection in the mirror." to become "sees her reflection in the mirror." depending on the player's pronouns setting. It will default to neutral pronouns.

The tags are: %they%, %them%, %their%, %theirs%, %themselves%

The tags will format as such, respectively:

• Neutral: they, them, their, theirs, themselves
• Female: she, her, her, hers, herself
• Male: he, him, his, his, himself