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/16_Nehemiah/Chapter_01.md

@@ -1,3 +1,4 @@
+Nehemiah Prays for His People
 
 # Chapter 1
 1. The words of Nehemiah the son of Hachaliah.

NKJV/16_Nehemiah/Chapter_02.md

@@ -1,3 +1,4 @@
+Nehemiah Sent to Judah
 
 # Chapter 2
 1. And it came to pass in the month of Nisan, in the twentieth year of King Artaxerxes, when wine was before him, that I took the wine and gave it to the king. Now I had never been sad in his presence before.

NKJV/16_Nehemiah/Chapter_03.md

@@ -1,3 +1,4 @@
+Rebuilding the Wall
 
 # Chapter 3
 1. Then Eliashib the high priest rose up with his brethren the priests and built the Sheep Gate; they consecrated it and hung its doors. They built as far as the Tower of the Hundred, and consecrated it, then as far as the Tower of Hananel.

NKJV/16_Nehemiah/Chapter_04.md

@@ -1,3 +1,4 @@
+The Wall Defended Against Enemies
 
 # Chapter 4
 1. But it so happened, when Sanballat heard that we were rebuilding the wall, that he was furious and very indignant, and mocked the Jews.

NKJV/16_Nehemiah/Chapter_05.md

@@ -1,3 +1,4 @@
+Nehemiah Deals with Oppression
 
 # Chapter 5
 1. And there was a great outcry of the people and their wives against their Jewish brethren.

NKJV/16_Nehemiah/Chapter_06.md

@@ -1,3 +1,4 @@
+Conspiracy Against Nehemiah
 
 # Chapter 6
 1. Now it happened when Sanballat, Tobiah, Geshem the Arab, and the rest of our enemies heard that I had rebuilt the wall, and that there were no breaks left in it (though at that time I had not hung the doors in the gates),

NKJV/16_Nehemiah/Chapter_07.md

@@ -1,3 +1,4 @@
+List of Returning Exiles
 
 # Chapter 7
 1. Then it was, when the wall was built and I had hung the doors, when the gatekeepers, the singers, and the Levites had been appointed,

NKJV/16_Nehemiah/Chapter_08.md

@@ -1,3 +1,4 @@
+Ezra Reads and Explains the Law
 
 # Chapter 8
 1. Now all the people gathered together as one man in the open square that was in front of the Water Gate; and they told Ezra the scribe to bring the Book of the Law of Moses, which the Lord had commanded Israel.

NKJV/16_Nehemiah/Chapter_09.md

@@ -1,3 +1,4 @@
+The People Confess Their Sins
 
 # Chapter 9
 1. Now on the twenty-fourth day of this month the children of Israel were assembled with fasting, in sackcloth, and with dust on their heads.

NKJV/16_Nehemiah/Chapter_10.md

@@ -1,3 +1,4 @@
+The People Who Sealed the Covenant
 
 # Chapter 10
 1. Now those who placed their seal on the document were:

NKJV/16_Nehemiah/Chapter_11.md

@@ -1,3 +1,4 @@
+The People Dwelling in Jerusalem
 
 # Chapter 11
 1. Now the leaders of the people dwelt at Jerusalem; the rest of the people cast lots to bring one out of ten to dwell in Jerusalem, the holy city, and nine-tenths were to dwell in other cities.

NKJV/16_Nehemiah/Chapter_12.md

@@ -1,3 +1,4 @@
+The Priests and Levites
 
 # Chapter 12
 1. Now these are the priests and the Levites who came up with Zerubbabel the son of Shealtiel, and Jeshua: Seraiah, Jeremiah, Ezra,

NKJV/16_Nehemiah/Chapter_13.md

@@ -1,3 +1,4 @@
+Principles of Separation
 
 # Chapter 13
 1. On that day they read from the Book of Moses in the hearing of the people, and in it was found written that no Ammonite or Moabite should ever come into the assembly of God,