clean composer dependencies and specfile (#141)

* remove all files in htdocs/vendor/ except i18n in datatables,
  because they'll be managed by composer
* add .gitignore in htdocs/vendor/ to ensure no files would be tracked
  there except for htdocs/vendor/datatables/i18n
* improve composer.json file to clean the downloaded dependencies and
  keep only the required files in htdocs/vendor
* clean specfile: add bundled dependencies, remove custom autoload and
  local config file, manage the config file migration to /etc/service-desk,
  clean hidden files in bundled php libs

composer.json

@@ -9,20 +9,30 @@
     },
     "scripts": {
         "post-update-cmd": [
+
             "rm -rf htdocs/vendor/bootstrap",
             "cp -R vendor/twbs/bootstrap/dist htdocs/vendor/bootstrap",
+            "rm -rf htdocs/vendor/bootstrap/site htdocs/vendor/bootstrap/js/bootstrap.esm* htdocs/vendor/bootstrap/js/bootstrap.js*  htdocs/vendor/bootstrap/package-lock.json htdocs/vendor/bootstrap/scss",
+            "rm -rf vendor/twbs/bootstrap",
+
             "rm -f htdocs/vendor/jquery/js/*",
+            "mkdir -p htdocs/vendor/jquery/js",
             "cp vendor/components/jquery/jquery.min.* htdocs/vendor/jquery/js/",
+            "rm -rf vendor/components/jquery",
+
             "rm -f htdocs/vendor/datatables/*.js htdocs/vendor/datatables/*.css",
             "cp vendor/datatables.net/datatables.net/js/dataTables.min.js htdocs/vendor/datatables/",
             "cp vendor/datatables.net/datatables.net-bs5/css/dataTables.bootstrap5.min.css htdocs/vendor/datatables/",
             "cp vendor/datatables.net/datatables.net-bs5/js/dataTables.bootstrap5.min.js htdocs/vendor/datatables/",
             "cp vendor/datatables.net/datatables.net-buttons/js/dataTables.buttons.min.js htdocs/vendor/datatables/",
             "cp vendor/datatables.net/datatables.net-buttons-bs5/css/buttons.bootstrap5.min.css htdocs/vendor/datatables/",
             "cp vendor/datatables.net/datatables.net-buttons-bs5/js/buttons.bootstrap5.min.js htdocs/vendor/datatables/",
+            "rm -rf vendor/datatables.net",
+
             "rm -rf htdocs/vendor/font-awesome/*",
             "cp -R vendor/fortawesome/font-awesome/css htdocs/vendor/font-awesome",
-            "cp -R vendor/fortawesome/font-awesome/webfonts htdocs/vendor/font-awesome"
+            "cp -R vendor/fortawesome/font-awesome/webfonts htdocs/vendor/font-awesome",
+            "rm -rf vendor/fortawesome/font-awesome"
         ]
     }
 }

htdocs/vendor/.gitignore

@@ -0,0 +1,3 @@
+*
+!.gitignore
+!datatables/i18n