docs: update SUPPORT.md and add link in sidebar

Signed-off-by: Nora Blomaard <n.blomaard@gmail.com>

Author: noraeb

SUPPORT.md

@@ -0,0 +1,39 @@
+# Support
+
+## Voluntary Support Channels
+
+### LF Energy Slack
+
+Join the LF Energy Slack workspace to connect with the CoMPAS community:
+
+-   **Workspace**: [LF Energy Slack](https://lfenergy.slack.com/)
+-   **Channel**: `#compas`
+
+### Github Issues
+
+For bug reports, feature requests, and security vulnerabilities, please use GitHub Issues in the relevant repository:
+
+-   [CoMPAS Open SCD Issues](https://github.com/com-pas/compas-open-scd/issues)
+-   [CoMPAS SCL Data Service Issues](https://github.com/com-pas/compas-scl-data-service/issues)
+-   [CoMPAS CIM Mapping Issues](https://github.com/com-pas/compas-cim-mapping/issues)
+-   [CoMPAS SCL Validator Issues](https://github.com/com-pas/compas-scl-validator/issues)
+-   [CoMPAS Core Issues](https://github.com/com-pas/compas-core/issues)
+
+When creating an issue, please use the appropriate issue template (bug report, feature request, etc.) and provide all the requested information. This helps maintainers understand and address your issue more efficiently.
+
+### Useful Links
+
+-   Website: [CoMPAS - LF Energy](https://www.lfenergy.org/projects/compas/)
+-   [Artwork](https://github.com/lf-energy/artwork/tree/main/projects/compas)
+-   Mailing lists:
+    -   [CoMPAS](https://lists.lfenergy.org/g/CoMPAS)
+    -   [CoMPAS-dev](https://lists.lfenergy.org/g/CoMPAS-dev)
+    -   [CoMPAS-tsc](https://lists.lfenergy.org/g/CoMPAS-tsc)
+-   [Calender](https://zoom-lfx.platform.linuxfoundation.org/meetings/compas)
+
+## Professional Services
+
+The following companies provide commercial support for CoMPAS:
+
+* [BearingPoint](https://www.bearingpoint.com/)
+* [SprintEins](https://sprinteins.com/)

docs/SUPPORT.md

@@ -45,6 +45,9 @@ <h2>
         <li class="nav-list-item">
           <a class="sidebar-nav-item{% if page.url == '/MONITORING.html' %} active{% endif %}" href="{{ site.baseurl }}/MONITORING.html">Monitoring</a>
         </li>
+        <li class="nav-list-item">
+          <a class="sidebar-nav-item{% if page.url == '/SUPPORT.html' %} active{% endif %}" href="{{ site.baseurl }}/SUPPORT.html">Support</a>
+        </li>
       </ul>
     </nav>