feat(debian): 添加 DEB 包构建和发布工作流及相关文件

debian/postinst

@@ -0,0 +1,31 @@
+#!/bin/sh
+# postinst script for chsrc
+
+set -e
+
+case "$1" in
+    configure)
+        # Update man database
+        if command -v mandb >/dev/null 2>&1; then
+            mandb -q /usr/share/man/man1/chsrc.1 2>/dev/null || true
+        fi
+        
+        # Make sure chsrc is executable
+        chmod +x /usr/bin/chsrc
+        
+        echo "chsrc has been successfully installed!"
+        echo "Run 'chsrc help' to get started."
+        ;;
+
+    abort-upgrade|abort-remove|abort-deconfigure)
+        ;;
+
+    *)
+        echo "postinst called with unknown argument \`$1'" >&2
+        exit 1
+        ;;
+esac
+
+#DEBHELPER#
+
+exit 0