feat: 1.21.9+ Support

[Bram1903]

• Added: AvatarMeta
• Changed: PlayerMeta to extend AvatarMeta

[coderabbitai]

📝 Walkthrough

Walkthrough

A new AvatarMeta class is introduced to manage avatar appearance metadata bits including cape, jacket, sleeves, legs, hat, and right-hand main. PlayerMeta now extends AvatarMeta instead of LivingEntityMeta, inheriting these features and removing duplicate method definitions. Metadata offset indices are adjusted accordingly.

Changes

Cohort / File(s)	Summary
New Avatar Metadata Class api/src/main/java/me/tofaa/entitylib/meta/types/AvatarMeta.java	Introduces AvatarMeta extending LivingEntityMeta with public constants OFFSET and MAX_OFFSET, bitmask constants for avatar features (cape, jacket, sleeves, legs, hat), and accessor/mutator pairs for each feature. Includes version-aware behavior with checks for ServerVersion.V_1_9 and bitwise operations for metadata manipulation.
Player Metadata Refactor api/src/main/java/me/tofaa/entitylib/meta/types/PlayerMeta.java	Changes inheritance from LivingEntityMeta to AvatarMeta, delegating avatar feature methods upward. Removes duplicate cape, jacket, sleeve, leg, hat, and right-hand-main accessors/mutators. Updates shoulder data offsets from (OFFSET, 4)/(OFFSET, 5) to (OFFSET, 2)/(OFFSET, 3) and adds version checks for ServerVersion.V_1_11. Adjusts MAX_OFFSET from OFFSET + 1 to OFFSET + 4.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

🐰 A hop and a bound, refactoring's done,
Avatar features now share the fun,
Up the hierarchy, methods ascend,
PlayerMeta and AvatarMeta now blend,
One class inherits, one code runs true! 🌟

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title refers to version support (1.21.9+) but the actual changes involve refactoring entity metadata classes by extracting avatar-related features into a new AvatarMeta class and reorganizing PlayerMeta to extend it.	Consider a more specific title that reflects the primary technical change, such as 'refactor: Extract avatar metadata into separate AvatarMeta class' or 'feat: Add AvatarMeta base class for shared avatar properties'.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

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