Code Clean up, more testing

Remove unused code and classes.
Clean up code to remove all named constant from them and throw
deprecation alerts if used.
Add basic psalm setup in root folder and remove from www folder

vendor/symfony/console/Output/ConsoleSectionOutput.php

@@ -115,7 +115,8 @@ class ConsoleSectionOutput extends StreamOutput
             // re-add the line break (that has been removed in the above `explode()` for
             // - every line that is not the last line
             // - if $newline is required, also add it to the last line
-            if ($i < $count || $newline) {
+            // - if it's not new line, but input ending with `\PHP_EOL`
+            if ($i < $count || $newline || str_ends_with($input, \PHP_EOL)) {
                 $lineContent .= \PHP_EOL;
             }
 
@@ -149,6 +150,15 @@ class ConsoleSectionOutput extends StreamOutput
         return $linesAdded;
     }
 
+    /**
+     * @internal
+     */
+    public function addNewLineOfInputSubmit()
+    {
+        $this->content[] = \PHP_EOL;
+        ++$this->lines;
+    }
+
     protected function doWrite(string $message, bool $newline)
     {
         if (!$this->isDecorated()) {