Release v3.6.2: Fix Linux compatibility in polyglot hook wrapper

Fixed POSIX compatibility issue in hooks/run-hook.cmd that caused
"Bad substitution" errors on Ubuntu/Debian systems where /bin/sh is dash.

Changes:
- Replaced bash-specific ${BASH_SOURCE[0]:-$0} with POSIX-compliant $0
- Tested with both bash and sh (POSIX mode) on macOS
- Updated version to 3.6.2 in all required files

Fixes #141

hooks/run-hook.cmd

@@ -13,7 +13,7 @@ exit /b
 CMDBLOCK
 
 # Unix shell runs from here
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]:-$0}")" && pwd)"
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 SCRIPT_NAME="$1"
 shift
 "${SCRIPT_DIR}/${SCRIPT_NAME}" "$@"