Add platform support note and existing file handling documentation to README and skill docs, clarifying Windows 11-only testing, per-script ffmpeg/ffprobe requirements, and file replacement behavior with -y flag across Clone-Image.md, Clone-Video.md, Compare-Videos.md, Crop-Clips.md, Get-VideoAudio.md, SKILL.md and index.md

skill/index.md

@@ -5,8 +5,9 @@ A collection of PowerShell scripts for video processing tasks using ffmpeg and f
 ## Prerequisites
 
 - **PowerShell 7+** (pwsh.exe)
-- **ffmpeg** - Must be in system PATH
-- **ffprobe** - Must be in system PATH
+- **Platform**: tested on Windows 11 only. Linux and WSL are not tested and not supported.
+- **ffmpeg** - Must be in system PATH. Not needed by Get-FramesCount.ps1, Get-VideoInfo.ps1 and Create-FullSubtitle.ps1.
+- **ffprobe** - Must be in system PATH. Not needed by Stitch-InBetween.ps1.
 - **rife-ncnn-vulkan** - Must be in system PATH and also defined the environment variable **RIFE_HOME** to the same directory
 - **upscayl-bin** - Must be in system PATH and also defined the environment variable **UPSCAYL_HOME** to the same directory