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!

NKJV/48_Galatians/Chapter_01.md

@@ -1,3 +1,4 @@
+Greeting
 
 # Chapter 1
 1. Paul, an apostle (not from men nor through man, but through Jesus Christ and God the Father who raised Him from the dead),

NKJV/48_Galatians/Chapter_02.md

@@ -1,3 +1,4 @@
+Defending the Gospel
 
 # Chapter 2
 1. Then after fourteen years I went up again to Jerusalem with Barnabas, and also took Titus with me.

NKJV/48_Galatians/Chapter_03.md

@@ -1,3 +1,4 @@
+Justification by Faith
 
 # Chapter 3
 1. O foolish Galatians! Who has bewitched you that you should not obey the truth, before whose eyes Jesus Christ was clearly portrayed among you as crucified?

NKJV/48_Galatians/Chapter_04.md

@@ -1,3 +1,4 @@
+Sons and Heirs Through Christ
 
 # Chapter 4
 1. Now I say that the heir, as long as he is a child, does not differ at all from a slave, though he is master of all,

NKJV/48_Galatians/Chapter_05.md

@@ -1,3 +1,4 @@
+Christian Liberty
 
 # Chapter 5
 1. Stand fast therefore in the liberty by which Christ has made us free, and do not be entangled again with a yoke of bondage.

NKJV/48_Galatians/Chapter_06.md

@@ -1,3 +1,4 @@
+Bear and Share Burdens
 
 # Chapter 6
 1. Brethren, if a man is overtaken in any trespass, you who are spiritual restore such a one in a spirit of gentleness, considering yourself lest you also be tempted.