Tags enable categorizing items for boundary checks and other systems.
Added tags field to Thing and ThingTemplate, updated load and spawn
functions to handle tags from TOML definitions.
Implements TDD feature for readable text on Things:
- Added readable_text field to Thing dataclass
- Extended ThingTemplate to parse readable_text from TOML
- Created read command that finds objects by name/alias in inventory or on ground
- Handles edge cases: no target, not found, not readable
Objects were comparing by value instead of identity, causing
list.remove() to remove the wrong object when moving items with
identical attributes. Set eq=False on all dataclasses to use
identity-based comparison.
Thing is an Object subclass with description, portable flag, and aliases.
Entity.can_accept() returns True for portable Things, enabling the
containment model where entities carry items in their contents.
