GSOC: add Keptn project ideas for GSoC 23 (#832)

* docs: add Keptn project ideas for GSoC 23

Signed-off-by: Brad McCoy <bradmccoydev@gmail.com>

summerofcode/2023.md

@@ -230,6 +230,18 @@ If you are a project maintainer and consider mentoring during the GSoC 2023 cycl
 - Difficulty: Hard
 - Upstream Issue (URL): https://github.com/WasmEdge/WasmEdge/issues/2244
 
+### Keptn
+
+#### Keptn Plugin for Backstage
+
+- Description: Backstage is an open platform for building developer portals. As the website states, "powered by a centralized software catalog, Backstage restores order to your infrastructure and enables your product teams to ship high-quality code quickly — without compromising autonomy". It would be nice to provide Keptn integration for this portal so that Keptn can connect as many as other tools. See all Backstage Plugins.  A Possible solution could be a specialized plugin for Keptn using Keptn REST API and/or CLI. It might be also possible to create a unified plugin for Keptn and other CI/CD tools, e.g. implemented on the top of the Cloud Events / CDEvents standard.
+- Expected outcome: Finding issues blocking multiple control planes, and possibly fixing them.
+- Recommended Skills: Typescript, Javascript, React, Backstage
+- Mentor(s): [Brad McCoy](https://github.com/bradmccoydev) bradmccoydev@gmail.com
+- Expected project size: 175h
+- Difficulty: Hard
+- Upstream Issue (URL): https://github.com/keptn/integrations/issues/19
+
 ### OpenFeature
 
 #### Streamlined OpenFeature Enhancement Proposal Process