Add .env.example for sermon converter configuration

- Provides template for required environment variables
- Sermon-specific paths and FFmpeg settings
- File stability and directory configuration

.env.example

@@ -0,0 +1,26 @@
+# Copy this file to .env and configure with your paths
+
+# Directory paths  
+SERMON_WATCH_PATH=/path/to/watch/sermons
+SERMON_OUTPUT_PATH=/path/to/output/sermons
+
+# FFmpeg Configuration
+FFMPEG_BINARY=ffmpeg
+VIDEO_CODEC=av1_qsv
+HW_ACCEL=qsv
+HW_DEVICE=qsv=hw
+FFMPEG_PRESET=4
+VIDEO_BITRATE=6M
+MAX_BITRATE=12M
+BUFFER_SIZE=24M
+AUDIO_CODEC=libopus
+AUDIO_BITRATE=192k
+
+# File Stability Settings
+STABILITY_CHECK_INTERVAL=1
+STABILITY_REQUIRED_CHECKS=30
+MAX_STABILITY_WAIT_HOURS=0.5
+
+# Directory Settings
+CREATE_YEAR_MONTH_DIRS=true
+PRESERVE_ORIGINAL_FILES=false