[docs] Add intro text to Ecosystem sections (#6201)

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

docs/website/content/ecosystem/_index.md

@@ -4,14 +4,20 @@ kind: support
 categories:
 - key: rego
   title: Rego Language
+  description: |
+    Rego is the policy language used by OPA and there are various integrations that make working with the language easier.
 - key: production
   title: OPA at Scale
+  description: |
+    OPA has a number of features that are most useful when running OPA in production. These integrations make use of those features, and make it easier to use OPA at scale.
 - key: tool
   title: Tool Integrations
-- key: language
-  title: Language Integrations
-- key: builtwithopa
-  title: Built with OPA
+  description: |
+    OPA plays nice with a range of existing tools too via some bespoke integrations.
+- key: createwithopa
+  title: Create with OPA
+  description: |
+    OPA's SDKs and APIs offer a solid foundation for all kinds of projects. See the integrations below for inspiration.
 intro: |
   Showcase of OPA integrations, use-cases, and related projects.
 ---

docs/website/content/ecosystem/go-integration.md

@@ -1,7 +1,7 @@
 ---
 title: Go Integrations
 description: Projects using OPA as a Go module
-category: builtwithopa
+category: createwithopa
 ---
 
 Projects using OPA as a Go module to implement policy-based functionality.

docs/website/content/ecosystem/rest-api-integration.md

@@ -1,7 +1,7 @@
 ---
 title: REST API Integrations
 description: Examples of projects which integrate with the OPA REST API.
-category: builtwithopa
+category: createwithopa
 ---
 
 OPA’s [REST API](../../rest-api) is the foundation for many integrations. Public examples are listed below.

docs/website/content/ecosystem/wasm-integration.md

@@ -1,7 +1,7 @@
 ---
 title: Wasm Integrations
 description: Projects using the Wasm functionality of OPA.
-category: language
+category: createwithopa
 ---
 
 OPA’s [Wasm Functionality](../../wasm) has been used to build the following projects.

docs/website/layouts/ecosystem/section.html.html

@@ -28,6 +28,7 @@ <h2>{{ $category.title }}</h2>
             <div class="card-body">
               <div class="card-text">
                 <div>
+                  <p class="mb-4">{{ $category.description }}</p>
                   <ul>
                     {{ range $page := where $.Pages "Section" "ecosystem" }}
                     {{ if eq $page.Params.category $category.key }}