Remove AppImage. Update package.sh (#8201)

* Refactor AppRun script generation in packaging

* Update minimum kernel version requirement to 6.13

* Update minimum kernel version requirement to 5.14

* Revise runtime dependencies with version constraints

Updated runtime dependencies for package-rhel.sh to include version constraints and additional requirements.

* Modify package dependencies in package-debian.sh

Updated package dependencies to include libc6, fontconfig, coreutils, and bash.

* Remove AppImage packaging and upload steps

Removed AppImage packaging and upload steps from the workflow.

* Delete package-appimage.sh

* Simplify environment checks in Utils.cs

Removed checks for APPIMAGE environment variable and mount path.

* Update v2rayN.slnx

* Remove package scripts from v2rayN solution

Removed references to package-appimage.sh and pkg2appimage.yml from the solution file.

v2rayN/ServiceLib/Common/Utils.cs

@@ -994,11 +994,6 @@ public class Utils
                 return false;
             }
 
-            if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("APPIMAGE")))
-            {
-                return true;
-            }
-
             var exePath = GetExePath();
             var baseDir = string.IsNullOrEmpty(exePath) ? StartupPath() : Path.GetDirectoryName(exePath) ?? "";
             var p = baseDir.Replace('\\', '/');
@@ -1008,11 +1003,6 @@ public class Utils
                 return false;
             }
 
-            if (p.Contains("/.mount_", StringComparison.Ordinal))
-            {
-                return true;
-            }
-
             if (p.StartsWith("/opt/v2rayN", StringComparison.OrdinalIgnoreCase))
             {
                 return true;