[Docs] Document perfectionEffectOverride and missing CraftingBuff fields

[Lyeeedar]

Summary

Documentation updates based on game changes and code review:

• recipes.md: Added perfectionEffectOverride field documenting the quality value that makes perfection affect crafted item quality tier (basic/perfect/sublime)
• buffs.md: Added effectHint and statsTooltip fields to the CraftingBuff interface documentation; clarified baseScaling and stacksScaling descriptions

Game Changes Triggering These Updates

Commit	Description
7f557e4a	add bomb maker character and bomb recipes - introduced new bomb items with perfectionEffectOverride: quality in recipes
03a861d8	add a sickening concoction - another recipe using perfectionEffectOverride

Rotating Review

This run's rotating review covered the crafting area. The review identified:

1. perfectionEffectOverride was not documented in recipes.md
2. effectHint and statsTooltip fields on CraftingBuff were missing from buffs.md

Breaking Changes / Important Notes for Modders

• perfectionEffectOverride: quality is used by all bomb recipes. When creating recipes that should affect quality tier rather than stats, set this field.

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