Added complete NLT (New Living Translation) support and NKJV fixes

**NLT Integration:**
- Added NLT directory structure matching ESV/NKJV pattern
- Updated Dockerfile to COPY NLT /app/NLT
- Added NLT_DATA_DIR path and search engine initialization
- Updated getDataDir and /versions endpoints to support NLT
- Frontend will automatically include NLT in version dropdown

**NKJV Fixes:**
- Fixed thousands of NKJV chapter files (encoding, formatting issues)
- All NKJV content now serves correctly
- Preserves existing favorites and search functionality

**Complete 3-Version Bible Library:**
- ESV (English Standard Version) ✓
- NKJV (New King James Version) ✓
- NLT (New Living Translation) ✓

All versions now follow consistent directory structure and Docker integration!

NLT/57_Philemon/Chapter_01.md

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+Greetings from Paul
+
+1. This letter is from Paul, a prisoner for preaching the Good News about Christ Jesus, and from our brother Timothy.
+I am writing to Philemon, our beloved co-worker,
+2. and to our sister Apphia, and to our fellow soldier Archippus, and to the church that meets in your house.
+
+3. May God our Father and the Lord Jesus Christ give you grace and peace.Paul's Thanksgiving and Prayer
+
+4. I always thank my God when I pray for you, Philemon,
+5. because I keep hearing about your faith in the Lord Jesus and your love for all of God's people.
+6. And I am praying that you will put into action the generosity that comes from your faith as you understand and experience all the good things we have in Christ.
+7. Your love has given me much joy and comfort, my brother, for your kindness has often refreshed the hearts of God's people.Paul's Appeal for Onesimus
+
+8. That is why I am boldly asking a favor of you. I could demand it in the name of Christ because it is the right thing for you to do.
+9. But because of our love, I prefer simply to ask you. Consider this as a request from me--Paul, an old man and now also a prisoner for the sake of Christ Jesus.
+
+10. I appeal to you to show kindness to my child, Onesimus. I became his father in the faith while here in prison.
+11. Onesimus hasn't been of much use to you in the past, but now he is very useful to both of us.
+12. I am sending him back to you, and with him comes my own heart.
+
+13. I wanted to keep him here with me while I am in these chains for preaching the Good News, and he would have helped me on your behalf.
+14. But I didn't want to do anything without your consent. I wanted you to help because you were willing, not because you were forced.
+15. It seems you lost Onesimus for a little while so that you could have him back forever.
+16. He is no longer like a slave to you. He is more than a slave, for he is a beloved brother, especially to me. Now he will mean much more to you, both as a man and as a brother in the Lord.
+
+17. So if you consider me your partner, welcome him as you would welcome me.
+18. If he has wronged you in any way or owes you anything, charge it to me.
+19. I, PAUL, WRITE THIS WITH MY OWN HAND: I WILL REPAY IT. AND I WON'T MENTION THAT YOU OWE ME YOUR VERY SOUL!
+
+20. Yes, my brother, please do me this favor for the Lord's sake. Give me this encouragement in Christ.
+
+21. I am confident as I write this letter that you will do what I ask and even more!
+22. One more thing--please prepare a guest room for me, for I am hoping that God will answer your prayers and let me return to you soon.Paul's Final Greetings
+
+23. Epaphras, my fellow prisoner in Christ Jesus, sends you his greetings.
+24. So do Mark, Aristarchus, Demas, and Luke, my co-workers.
+
+25. May the grace of the Lord Jesus Christ be with your spirit.
+
+