Moved header and navbar into own .php files

includes/header.php

@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html lang="en" style="scroll-behavior: smooth">
+  <head>
+    <!-- Required meta tags -->
+    <meta charset="utf-8" />
+    <meta
+      name="viewport"
+      content="width=device-width, initial-scale=1, shrink-to-fit=no"
+    />
+    <link rel="stylesheet" href="./darkmode.css" />
+    <link rel="stylesheet" href="./style.css" />
+    <!-- Bootstrap CSS -->
+    <link
+      rel="stylesheet"
+      href="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/css/bootstrap.min.css"
+      integrity="sha384-TX8t27EcRE3e/ihU7zmQxVncDAy5uIKz4rEkgIXeMed4M0jlfIDPvg6uqKI2xXr2"
+      crossorigin="anonymous"
+    />
+
+    <title>Home | Pfosten Dynamics</title>
+    <link rel="icon" href="./img/favicon.png" />
+  </head>
+
+  <body onload="load()" class="couldDark">
+<?php require('navbar.php') ?>