Add prevention for breaking blocks without Fortune III enchantment

[Butterkeks1000]

Fixes #75

Add feature to prevent block breaking without "Fortune III" enchantment.

• Add requireFortuneIII and requireFortuneIII_msg fields to PreventerConfig.java.
• Add configuration entries for requireFortuneIII and requireFortuneIII_msg in CreateModConfig.java.
• Add check for "Fortune III" enchantment when breaking diamond, emerald, or lapis ore blocks in AttackBlockEvent.java.
• Update README.md to include the new feature under the "Breaking" section.

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