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/38_Zechariah/Chapter_01.md

@@ -1,3 +1,4 @@
+A Call to Repentance
 
 # Chapter 1
 1. In the eighth month of the second year of Darius, the word of the Lord came to Zechariah the son of Berechiah, the son of Iddo the prophet, saying,

NKJV/38_Zechariah/Chapter_02.md

@@ -1,3 +1,4 @@
+Vision of the Measuring Line
 
 # Chapter 2
 1. Then I raised my eyes and looked, and behold, a man with a measuring line in his hand.

NKJV/38_Zechariah/Chapter_03.md

@@ -1,3 +1,4 @@
+Vision of the High Priest
 
 # Chapter 3
 1. Then he showed me Joshua the high priest standing before the Angel of the Lord, and Satan standing at his right hand to oppose him.

NKJV/38_Zechariah/Chapter_04.md

@@ -1,3 +1,4 @@
+Vision of the Lampstand and Olive Trees
 
 # Chapter 4
 1. Now the angel who talked with me came back and wakened me, as a man who is wakened out of his sleep.

NKJV/38_Zechariah/Chapter_05.md

@@ -1,3 +1,4 @@
+Vision of the Flying Scroll
 
 # Chapter 5
 1. Then I turned and raised my eyes, and saw there a flying scroll.

NKJV/38_Zechariah/Chapter_06.md

@@ -1,3 +1,4 @@
+Vision of the Four Chariots
 
 # Chapter 6
 1. Then I turned and raised my eyes and looked, and behold, four chariots were coming from between two mountains, and the mountains were mountains of bronze.

NKJV/38_Zechariah/Chapter_07.md

@@ -1,3 +1,4 @@
+Obedience Better than Fasting
 
 # Chapter 7
 1. Now in the fourth year of King Darius it came to pass that the word of the Lord came to Zechariah, on the fourth day of the ninth month, Chislev,

NKJV/38_Zechariah/Chapter_08.md

@@ -1,3 +1,4 @@
+Jerusalem, Holy City of the Future
 
 # Chapter 8
 1. Again the word of the Lord of hosts came, saying,

NKJV/38_Zechariah/Chapter_09.md

@@ -1,3 +1,4 @@
+Israel Defended Against Enemies
 
 # Chapter 9
 1. The burden of the word of the Lord

NKJV/38_Zechariah/Chapter_10.md

@@ -1,3 +1,4 @@
+Restoration of Judah and Israel
 
 # Chapter 10
 1. Ask the Lord for rain

NKJV/38_Zechariah/Chapter_11.md

@@ -1,3 +1,4 @@
+Desolation of Israel
 
 # Chapter 11
 1. Open your doors, O Lebanon,

NKJV/38_Zechariah/Chapter_12.md

@@ -1,3 +1,4 @@
+The Coming Deliverance of Judah
 
 # Chapter 12
 1. The burden of the word of the Lord against Israel. Thus says the Lord, who stretches out the heavens, lays the foundation of the earth, and forms the spirit of man within him:

NKJV/38_Zechariah/Chapter_13.md

@@ -1,3 +1,4 @@
+Idolatry Cut Off
 
 # Chapter 13
 1. "In that day a fountain shall be opened for the house of David and for the inhabitants of Jerusalem, for sin and for uncleanness.

NKJV/38_Zechariah/Chapter_14.md

@@ -1,3 +1,4 @@
+The Day of the Lord
 
 # Chapter 14
 1. Behold, the day of the Lord is coming,