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/08_Ruth/Chapter_01.md

@@ -1,3 +1,4 @@
+Elimelech's Family Goes to Moab
 
 # Chapter 1
 1. Now it came to pass, in the days when the judges ruled, that there was a famine in the land. And a certain man of Bethlehem, Judah, went to dwell in the country of Moab, he and his wife and his two sons.

NKJV/08_Ruth/Chapter_02.md

@@ -1,3 +1,4 @@
+Ruth Meets Boaz
 
 # Chapter 2
 1. There was a relative of Naomi's husband, a man of great wealth, of the family of Elimelech. His name was Boaz.

NKJV/08_Ruth/Chapter_03.md

@@ -1,3 +1,4 @@
+Ruth's Redemption Assured
 
 # Chapter 3
 1. Then Naomi her mother-in-law said to her, "My daughter, shall I not seek security for you, that it may be well with you?

NKJV/08_Ruth/Chapter_04.md

@@ -1,3 +1,4 @@
+Boaz Redeems Ruth
 
 # Chapter 4
 1. Now Boaz went up to the gate and sat down there; and behold, the close relative of whom Boaz had spoken came by. So Boaz said, "Come aside, friend, sit down here." So he came aside and sat down.