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/51_Colossians/Chapter_01.md

@@ -1,3 +1,4 @@
+Greeting
 
 # Chapter 1
 1. Paul, an apostle of Jesus Christ by the will of God, and Timothy our brother,

NKJV/51_Colossians/Chapter_02.md

@@ -1,3 +1,4 @@
+Not Philosophy but Christ
 
 # Chapter 2
 1. For I want you to know what a great conflict I have for you and those in Laodicea, and for as many as have not seen my face in the flesh,

NKJV/51_Colossians/Chapter_03.md

@@ -1,3 +1,4 @@
+Not Carnality but Christ
 
 # Chapter 3
 1. If then you were raised with Christ, seek those things which are above, where Christ is, sitting at the right hand of God.

NKJV/51_Colossians/Chapter_04.md

@@ -1,3 +1,4 @@
+Christian Graces; Final Greetings
 
 # Chapter 4
 1. Masters, give your bondservants what is just and fair, knowing that you also have a Master in heaven.Christian Graces