build: Upgrade stylelint to version 16 and fix issues

Migrate upgrade stylelint from version 10 to 16 and fix all the
stylelint and prettier issues in scss files.

The following deprecated stylistic rules are no longer supported in
stylelint, and the checks are taken over by prettier:

- string-quotes
- max-empty-lines
- max-line-length

src/app/shared/server-selector/server-selector.component.scss

@@ -1,16 +1,15 @@
 .actions {
-    display: inline-block;
+  display: inline-block;
 }
 
 .rg {
-    float: right;
+  float: right;
 }
 
 .ml {
-    margin-left: 10px;
+  margin-left: 10px;
 }
 
-
 /* .pba {
     width: 80%;
     left: 10%;
@@ -18,9 +17,9 @@
 } */
 
 .sticky {
-    position: sticky;
-    z-index: 1; // appear above mat-option
-    top: 0; // fix at the top
-    background-color: white; // don't see mat-option when scrolling
-    box-shadow: 1px -2px 10px 0px grey; // shadow at the bottom
-}
+  position: sticky;
+  z-index: 1; // appear above mat-option
+  top: 0; // fix at the top
+  background-color: white; // don't see mat-option when scrolling
+  box-shadow: 1px -2px 10px 0 grey; // shadow at the bottom
+}