docs: Add Rego comparisons and update env0 (open-policy-agent#6663)

These integrations feature on the learning rego page and the terraform
pages respectively.

Signed-off-by: Charlie Egan <charlie@styra.com>

docs/website/content/integrations/env0.md

@@ -22,6 +22,19 @@ code:
 blogs:
 - https://www.env0.com/blog/opa-tutorial-leveraging-env0-for-advanced-cloud-policy-management
 - https://www.env0.com/blog/open-policy-agent
+videos:
+  - title: Open Policy Agent Extensibility to use across your Infrastructure as Code
+    speakers:
+      - name: Anders Eknert
+        organization: styra
+    venue: Online
+    link: https://www.youtube.com/watch?v=bnsqPu9XwCE
+docs_features:
+  terraform:
+    note: |
+      env0 is a Terraform automation platform that allows you to manage your
+      infrastructure as code (IaC) at scale. It has a built-in integration with
+      OPA. See docs [here](https://docs.env0.com/docs/opa-plugin).
 ---
-env0 is the best way to deploy and manage IaC - Terraform, OpenTofu, CloudFormation, Pulumi, Kubernetes, and more. Our platform integrates with OPA to allow its users to streamline cloud governance, automate policy enforcement, and maintain control over cloud deployments while enabling managed self-service.
 
+env0 is the best way to deploy and manage IaC - Terraform, OpenTofu, CloudFormation, Pulumi, Kubernetes, and more. Our platform integrates with OPA to allow its users to streamline cloud governance, automate policy enforcement, and maintain control over cloud deployments while enabling managed self-service.

docs/website/content/integrations/rego-language-comparisons.md

@@ -0,0 +1,26 @@
+---
+title: Rego Language Comparisons
+subtitle: Learn Rego by comparison
+labels:
+  category: learning
+inventors:
+- styra
+tutorials:
+- https://docs.styra.com/opa/rego-language-comparisons
+docs_features:
+  learning-rego:
+    note: |
+      The [Rego Language Comparisons](https://docs.styra.com/opa/rego-language-comparisons)
+      guide provides a series of examples illustrating
+      how a policy can be expressed in a given language and the corresponding Rego code for comparison.
+      [Java](https://docs.styra.com/opa/rego-language-comparisons/java),
+      [Python](https://docs.styra.com/opa/rego-language-comparisons/python),
+      and [Go](https://docs.styra.com/opa/rego-language-comparisons/go) are currently covered.
+---
+
+The [Rego Language Comparisons](https://docs.styra.com/opa/rego-language-comparisons)
+guide provides a series of examples illustrating
+how a policy can be expressed in a given language and the corresponding Rego code for comparison.
+[Java](https://docs.styra.com/opa/rego-language-comparisons/java),
+[Python](https://docs.styra.com/opa/rego-language-comparisons/python),
+and [Go](https://docs.styra.com/opa/rego-language-comparisons/go) are currently covered.