Replace link to doxygen with link to guides and fix link to deprecated doxygen pages

Author: LasseRosenow

_includes/header.html

@@ -20,7 +20,7 @@
               <li><a href="{% link index.html %}#use-cases">Use Cases</a></li>
               <li><a href="https://www.hackster.io/riot-os" target="_blank">[email protected]<i class="bi bi-box-arrow-up-right align-text-bottom"></i></a></li>
               <li><a href="{% link index.html %}#faq">FAQ</a></li>
-              <li><a href="https://doc.riot-os.org/" target="_blank">Documentation <i class="bi bi-box-arrow-up-right align-text-bottom"></i></a></li>
+              <li><a href="https://guide.riot-os.org/" target="_blank">Documentation <i class="bi bi-box-arrow-up-right align-text-bottom"></i></a></li>
             </ul>
           </li>
           <li class="dropdown">

community.html

@@ -351,7 +351,7 @@ <h4>2016</h4>
               <div class="card-body">
                 <h4>Future</h4>
                 <p>
-                  We have a <a href="https://doc.riot-os.org/vision.html">vision</a>.
+                  We have a <a href="https://guide.riot-os.org/general/vision">vision</a>.
                   Be part of the community and follow ongoing enhancements in our
                   <a href="https://github.com/RIOT-OS/RIOT/labels/Type%3A%20new%20feature">issue tracker</a>.
                   Start working on new features or let the RIOT community know what you miss!
@@ -400,7 +400,7 @@ <h4 class="text-white">2017</h4>
           <div class="col-12 col-md-4">
             <h4 class="text-white">Future</h4>
               <p>
-                We have a <a href="https://doc.riot-os.org/vision.html" target="_blank">vision</a>. Be part of the community and follow ongoing enhancements in our <a href="https://github.com/RIOT-OS/RIOT/labels/Type%3A%20new%20feature" target="_blank">issue tracker</a>. Start working on new features or let the RIOT community know what you miss!
+                We have a <a href="https://guide.riot-os.org/general/vision" target="_blank">vision</a>. Be part of the community and follow ongoing enhancements in our <a href="https://github.com/RIOT-OS/RIOT/labels/Type%3A%20new%20feature" target="_blank">issue tracker</a>. Start working on new features or let the RIOT community know what you miss!
               </p>
           </div>
         </div>

index.html

@@ -184,7 +184,7 @@ <h3 class="card-title align-middle"> <i class="bi bi-terminal me-2"></i> Develop
                     Program as you are used to. Save time with common environments.
                   </p>
                   <ul class="check_style">
-                    <li class="pb-3"> Standard programming in C, C++, or <a href="https://doc.riot-os.org/using-rust.html" target="_blank">Rust</a></li>
+                    <li class="pb-3"> Standard programming in C, C++, or <a href="https://guide.riot-os.org/rust_tutorials/rust_in_riot" target="_blank">Rust</a></li>
                     <li class="pb-3"> Standard tools: gcc, gdb, valgrind </li>
                     <li class="pb-3"> Zero learning curve for embedded programming </li>
                     <li class="pb-3"> Code mostly without hardware dependence </li>
@@ -268,7 +268,7 @@ <h4 class="pt-3">Get the code</h4>
             </a>
           </div>
           <div class="col text-center py-4">
-            <a href="https://doc.riot-os.org/" target="_blank">
+            <a href="https://guide.riot-os.org/" target="_blank">
               <div class="card border-0">
                 <div class="card-body">
                   <i class="ri-file-text-line me-2 fs-2"></i>