HTML, CSS, JS and JAVA corrections (#810)

* CSS corrections

* HTML corrections

* JS corrections

* JAVA corrections

* remove tab

* CSS corrections 2

* JS corrections 2

* back to the roots

* max-linie 127

* add slash hr|br

* return bootstrap-icons.css

* return bootstrap-icons.min.css

* return bootstrap.min.css

* Update bootstrap-icons.css

* Update bootstrap-icons.min.css

* Update bootstrap-icons.min.css

* Update bootstrap.min.css

* CSS corrections

* HTML corrections

* JS corrections

* JAVA corrections

* remove tab

* CSS corrections 2

* JS corrections 2

* back to the roots

* max-linie 127

* add slash hr|br

* return bootstrap-icons.css

* Update bootstrap-icons.css

* Bootstrap CSS

* Update prism.css

src/main/resources/static/css/footer.css

@@ -0,0 +1,20 @@
+#footer {
+  display: flex;
+  flex-direction: column; /* Stack children vertically */
+  justify-content: center;
+  align-items: center;
+  width: 100%;
+}
+
+.footer-center {
+  display: flex;
+  align-items: center; /* Center children horizontally */
+  flex-grow: 1;
+}
+
+.footer-powered-by {
+  margin-top: auto; /* Pushes the text to the bottom */
+  color: grey;
+  text-align: center; /* Centers the text inside the div */
+  width: 100%; /* Full width to center the text properly */
+}