dhi: refresh how-to explore (#24602)

<!--Delete sections as needed -->

## Description

- Refreshed explore based on latest GUI. Removed steps with a direct
link. xref'd to previous sections to remove redundant steps.
- Consolidated explore and compare to minimize left nav sprawl and
because they're related use-cases.
- Renamed from "explore" to "search" in order to not conflict with the
about section that got renamed explore.
- Added in CLI commands to eventually remove the bolted-on, standalone
how-to cli topic.
- Cleaned up some fluff from the compare topic that was used to make it
feel more substantial when it was a standalone.


https://deploy-preview-24602--docsdocker.netlify.app/dhi/how-to/explore/

## Related issues or tickets

ENGDOCS-3222

## Reviews

<!-- Notes for reviewers here -->
<!-- List applicable reviews (optionally @tag reviewers) -->

- [ ] Editorial review

---------

Signed-off-by: Craig Osterhout <craig.osterhout@docker.com>

Author: craig-osterhout

content/guides/dhi-backstage.md

@@ -479,5 +479,5 @@ Different scanners detect different issues. Running all three gives you the most
 - [Create and build a DHI](/dhi/how-to/build/) — learn how to write a DHI definition file, build images locally.
 - [Use the DHI CLI](/dhi/how-to/cli/) — manage DHI images, mirrors, and customizations from the command line.
 - [Migrate to DHI](/dhi/migration/) — for applications that work with standard DHI images without additional packages.
-- [Compare images](/dhi/how-to/compare/) — evaluate security improvements between your original and hardened images.
+- [Compare images](/dhi/how-to/explore/#compare-and-evaluate-images) — evaluate security improvements between your original and hardened images.
 - [Docker Debug](/dhi/how-to/debug/) — troubleshoot distroless containers that have no shell.

content/manuals/dhi/core-concepts/cis.md

@@ -46,7 +46,7 @@ from the benchmark more quickly and confidently.
 ## Identify CIS-compliant images
 
 CIS-compliant images are labeled as **CIS** in the Docker Hardened Images catalog.
-To find them, [explore images](../how-to/explore.md) and look for the **CIS**
+To find them, [search the catalog](../how-to/explore.md) and look for the **CIS**
 designation on individual listings.
 
 ## Get the benchmark

content/manuals/dhi/core-concepts/fips.md

@@ -66,7 +66,7 @@ compliance requirements by incorporating components that meet the standard.
 Docker Hardened Images that support FIPS are marked as **FIPS** compliant
 in the Docker Hardened Images catalog.
 
-To find DHI repositories with FIPS image variants, [explore images](../how-to/explore.md) and:
+To find DHI repositories with FIPS image variants, [search the catalog](../how-to/explore.md) and:
 
 - Use the **FIPS** filter on the catalog page
 - Look for **FIPS** compliant on individual image listings

content/manuals/dhi/core-concepts/stig.md

@@ -58,7 +58,7 @@ Docker Hardened Images that include STIG scan results are labeled as **STIG** in
 the Docker Hardened Images catalog.
 
 To find DHI repositories with STIG image variants, [explore
-images](../how-to/explore.md) and:
+images](../how-to/explore.md#image-variants) and:
 
 - Use the **STIG** filter on the catalog page
 - Look for **STIG** labels on individual image listings

content/manuals/dhi/get-started.md

@@ -30,8 +30,8 @@ Docker account, pull and run an image, and compare it with a Docker Official Ima
    `node`, or `golang`). For this example, search for `python`.
 3. Select the Python repository to view its details.
 
-Continue to the next step to pull and run the image. To dive deeper into exploring
-images see [Explore Docker Hardened Images](./how-to/explore.md).
+Continue to the next step to pull and run the image. To dive deeper into searching
+and evaluating images, see [Search and evaluate Docker Hardened Images](./how-to/explore.md).
 
 ## Step 2: Pull and run the image
 
@@ -131,7 +131,7 @@ This comparison shows that the Docker Hardened Image:
 - Reduces size: From 412 MB down to 35 MB (91% reduction)
 - Minimizes packages: From 610 packages down to 80 (87% reduction)
 
-To dive deeper into comparing images see [Compare Docker Hardened Images](./how-to/compare.md).
+To dive deeper into comparing images see [Search and evaluate Docker Hardened Images](./how-to/explore.md#compare-and-evaluate-images).
 
 ## What's next
 

content/manuals/dhi/how-to/_index.md

@@ -4,7 +4,7 @@ description: Step-by-step guidance for working with Docker Hardened Images, from
 weight: 20
 params:
   grid_discover:
-    - title: Explore Docker Hardened Images
+    - title: Search and evaluate Docker Hardened Images
       description: Learn how to find and evaluate image repositories, variants, metadata, and attestations in the DHI catalog on Docker Hub.
       icon: travel_explore
       link: /dhi/how-to/explore/
@@ -49,11 +49,6 @@ params:
       description: Learn how to manage your mirrored and customized Docker Hardened Images in your organization.
       icon: reorder
       link: /dhi/how-to/manage/
-  grid_evaluate:
-    - title: Compare Docker Hardened Images
-      description: Learn how to compare Docker Hardened Images with other container images to evaluate security improvements and differences.
-      icon: compare
-      link: /dhi/how-to/compare/
   grid_verify:
     - title: Verify a Docker Hardened Image or chart
       description: Use Docker Scout or cosign to verify signed attestations like SBOMs, provenance, and vulnerability data for Docker Hardened Images and charts.
@@ -101,14 +96,6 @@ Mirror trusted images, customize as needed, and integrate into your workflows.
   items="grid_adopt"
 >}}
 
-## Evaluate
-
-Compare with other images to understand security improvements.
-
-{{< grid
-  items="grid_evaluate"
->}}
-
 ## Verify
 
 Check signatures, SBOMs, and provenance, and scan for vulnerabilities.