[codex] Add modern per-pattern mod whitelist modes

[wu-xiao-ya]

Summary

• add independent input/output mod whitelist and blacklist modes to Forge 1.20.1 and NeoForge 1.21.1 smart patterns
• migrate legacy ExcludedInputModIds / ExcludedOutputModIds data to canonical per-side rules
• apply mod rules consistently across preview, wildcard expansion, fallback selection, and AE2 pattern provider paths
• extend Forge and NeoForge networking with validated modes and ID lists, plus protocol version bumps
• add shared JUnit coverage, platform codec tests, documentation, localization, and a root modern-build Actions matrix
• replace machine-local modern build dependencies with published Maven coordinates

Validation

• Forge 1.20.1 local: 16 tests, 0 failures; test build passed on JDK 17
• NeoForge 1.21.1 local: 15 tests, 0 failures; test build passed with Java 21 toolchain
• GitHub Actions Modern Builds: Forge 1.20.1 and NeoForge 1.21.1 both passed

Resolves #5