Update ErlangConsole methods and modifiers

Refactor ErlangConsoleActionPromoter and ErlangConsoleCommandLineState classes by making the notEnter method static and adding the @NotNull annotation to the getConsole method. This improves code quality and readability while ensuring non-null values for the console.

src/org/intellij/erlang/console/ErlangConsoleActionPromoter.java

@@ -34,7 +34,7 @@ public int compare(@NotNull AnAction o1, @NotNull AnAction o2) {
       return notEnter(o1) ? notEnter(o2) ? 0 : -1 : notEnter(o2) ? 1 : 0;
     }
 
-    private boolean notEnter(AnAction o) {
+    private static boolean notEnter(AnAction o) {
       return !(o instanceof EnterAction);
     }
   };

src/org/intellij/erlang/console/ErlangConsoleCommandLineState.java

@@ -40,7 +40,7 @@ public ErlangConsoleCommandLineState(@NotNull ErlangConsoleRunConfiguration conf
     myConfig = config;
     TextConsoleBuilder consoleBuilder = new TextConsoleBuilderImpl(myConfig.getProject()) {
       @Override
-      public ConsoleView getConsole() {
+      public @NotNull ConsoleView getConsole() {
         ErlangConsoleView consoleView = new ErlangConsoleView(myConfig.getProject());
         ErlangConsoleUtil.attachFilters(myConfig.getProject(), consoleView);
         return consoleView;