Intents are now /decl/intent.

[MistakeNot4892]

Description of changes

• Adds getters/setters and helpers to intent checking, replacing all use of a_intent.
• Rewrites intent selectors to condense/improve code and remove separate intent tracking.
• Removes direct intent setting on mob definitions in favour of setting via AI init.
• Changes intent strings to /decl/intent with handling/validation for such.
• Removes intent_numeric() in favour of using get_next_in_list() and get_previous_in_list() for hotkey cycling.
• Removes outdated robot intent selector limitations.
• Adds intent flags preferentially used check checking intent, rather than strict intent types.

Why and what will this PR improve

This is more or less just an infrastructure update to support dynamic intents when I get to them, but it does also clean up some 12 year old crufty code. Tested with humans, robots and nymphs.

Authorship

Myself.

Changelog

Nothing player-facing.

[MistakeNot4892]

There's a good chance the deity changes break deity, but I am intending to delete it shortly so I am not going to test it.

[MistakeNot4892]

Need to retest with the diona and psionics changes.

[MistakeNot4892]

Commented out nymph intents/intent selectors entirely, they need the full selector for interactions to work and I am unwilling to do more icon work for this PR to fix such a niche side of it. Will revisit with future intent PRs.