Updating system-chat prompt to include new class, skills, and background attributes, removing age, and rearranging them to match the character creation prompt. Also adding "Current " in front of Health and Hunger attributes.

Update ServerPackets.java to simplify the character creation prompt, removing biome and entity Type - so we get more authentic characters.

- Added placeholder CHANGELOG.md file, to track releases
- Added CONTRIBUTING.md with instructions on how to contribute
- Updated "Creature Chat" name to "CreatureChat"
- Updated README.md (new resource links, removed upgrade notes, simplified some sections

Updating README.md, renaming COPYING to LICENSE.md (replacing with markdown version of GPLv3), updating screenshots to owlmaddie versions.

- Allow entity to respond to being handed an item automatically (limit 1 time), if they already have a character sheet. NOTE: They must need the item and accept it.

- Raise player name when pending ... animation shown

Small refactor to entity character sheet context, and prompt - insert each line separately, instead of the entire character sheet. Added entity_health as well.

- Made a generic enum to ask for specific random phrases
- Inject new random frequency term + random adjective when generating a new character, to give more randomness to the model.

- Click Handler no longer plays sounds
- Moved sounds to ClientPackets, so all clients play nearby sounds from the Chat interactions. Sound gets quieter with distance (0 to 8 blocks)

- Add new packet messages for Open UI, Close UI, and Sync UI status to the client
- Render ... animation above player heads who have the Chat UI open
- Added removed() method to Chat UI screen, so it always gets called, even when a player logs off
- Chat screen now sends messages to server with open/close status

Large refactor of clientPackets and serverPackets, to gather all network code into a more sane place.

Added instructions to README for creating an OpenAI key and information on API key security and pricing disclosures.

Fixed permissions on commands, so only help command can be run by all users. All other commands require op (level 4 permission). Also added more debug log output from commands, so it's logged on the server when a command is run.

- Filter out the current player if in 1st person, otherwise render their bubbles
- Refactor render code to better support missing chatData, for example a Player with no chatData still needs a name rendered

- Removing example mixins (from Fabric starter project)
- Replacing old screenshots
- Added Discord invite link to README