Add JSON output format for programmatic access

Implements structured JSON output with hierarchical schema including
book metadata, chapters, verses, and footnotes. All existing flags
(-F, -g, -L) are respected in JSON mode.

README.md

@@ -15,6 +15,7 @@ Code largely based off of [https://github.com/bontibon/kjv.git](https://github.c
       -F      no footnotes
       -g      show only German (no Latin)
       -L      show only Latin (no German)
+      -j      output as JSON
       -h      show help
 
       Reference types:
@@ -55,6 +56,56 @@ The text includes footnotes marked with Unicode superscript numbers (e.g., ¹,
 
 - Use `-F` flag to disable footnote display if desired
 
+### JSON Output
+
+allioli supports structured JSON output for programmatic access to bible verses and footnotes. The JSON schema provides a hierarchical structure with book information, chapters, verses, and associated footnotes.
+
+- Use `-j` flag to output in JSON format
+- All other flags (`-F`, `-g`, `-L`) are respected in JSON mode
+- The JSON structure follows this schema:
+
+```json
+{
+  "book": {
+    "name": "Johannes",
+    "abbreviation": "Joh",
+    "number": 51
+  },
+  "chapter": 1,
+  "verses": [
+    {
+      "verse": 1,
+      "text": {
+        "latin": "...",
+        "german": "..."
+      },
+      "footnotes": [
+        {
+          "number": 1,
+          "text": "..."
+        }
+      ]
+    }
+  ]
+}
+```
+
+**Examples:**
+
+```bash
+# Get John 1:1 as JSON
+./allioli -j "Johannes 1:1"
+
+# Get verses without footnotes
+./allioli -j -F "Johannes 1:1-3"
+
+# Get only Latin text (with footnotes)
+./allioli -j -L "Johannes 1:1"
+
+# Get only German text (with footnotes)
+./allioli -j -g "Johannes 1:1-5"
+```
+
 ## Install
 
 ### From Source