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.

.github/workflows/build-linux.yml

@@ -68,21 +68,6 @@ jobs:
         file_glob: true
         prerelease: true
 
-    - name: Package AppImage
-      if: github.event.inputs.release_tag != ''
-      run: |
-        chmod a+x package-appimage.sh
-        ./package-appimage.sh
-
-    - name: Upload AppImage to release
-      uses: svenstaro/upload-release-action@v2
-      if: github.event.inputs.release_tag != ''
-      with:
-        file: ${{ github.workspace }}/v2rayN*.AppImage
-        tag: ${{ github.event.inputs.release_tag }}
-        file_glob: true
-        prerelease: true
-
     # release zip archive
     - name: Package release zip archive
       if: github.event.inputs.release_tag != ''