Merge pull request #222 from Kuadrant/cel

docs(CEL): added CEL docs to Concepts section

Author: alexsnaps

mkdocs.yml

@@ -101,6 +101,10 @@ plugins:
           - /doc/user-guides/observability/token-metrics.md
           - /doc/extensions/planpolicy.md
           - /doc/user-guides/planpolicy/plan-based-rate-limiting.md
+          - /doc/cel/introduction.md
+          - /doc/cel/standard.md
+          - /doc/cel/extensions/optional.md
+          - /doc/cel/extensions/strings.md
           - /doc/images/*
         - name: authorino
           import_url: https://github.com/kuadrant/authorino?edit_uri=/blob/main/&branch=main
@@ -216,6 +220,11 @@ nav:
       - 'TokenRateLimitPolicy': kuadrant-operator/doc/overviews/token-rate-limiting.md
       - 'TelemetryPolicy': kuadrant-operator/doc/overviews/telemetrypolicy.md
       - 'PlanPolicy': kuadrant-operator/doc/extensions/planpolicy.md
+      - 'CEL':
+          - 'Introduction': kuadrant-operator/doc/cel/introduction.md
+          - 'Standard library': kuadrant-operator/doc/cel/standard.md
+          - 'Optional type': kuadrant-operator/doc/cel/extensions/optional.md
+          - 'String extensions': kuadrant-operator/doc/cel/extensions/strings.md
   - 'APIs & Reference':
       - 'AuthPolicy': kuadrant-operator/doc/reference/authpolicy.md
       - 'DNSPolicy': kuadrant-operator/doc/reference/dnspolicy.md