site: rework guides filters and tags taxonomy

- Rework the filtering system for guides to drop the use of the
  "products", "subjects", and "levels" taxonomies in favor of "tags" and
  "languages"
- This change means that the existing taxonomy functionality integrates
  better with the guides filtering, and there are fewer parameters to
  keep in mind when adding metadata to a guide
  - Only two taxonomies instead of three
  - Only one of those taxonomies are guides-specific (languages)
  - The other taxonomy (tags) works for all content
- Updates how tags and tag pages are rendered in general

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

Author: dvdksn

content/guides/_index.md

@@ -1,6 +1,6 @@
 ---
-title: Guides
-keywords: Docker guides
+title: Docker guides
+linkTitle: Guides
 description: Explore the Docker guides
 params:
   icon: developer_guide

content/guides/admin-set-up/_index.md

@@ -2,10 +2,11 @@
 title: Set up your company for success with Docker
 linkTitle: Admin set up 
 summary: Get the most out of Docker by streamlining workflows, standardizing development environments, and ensuring smooth deployments across your company.
-description: Learn how to onboard your company and take advantage of all of the Docker products and features. 
-levels: [intermediate]
+description: Learn how to onboard your company and take advantage of all of the Docker products and features.
+tags: [admin]
 params:
   featured: true
+  time: 20 minutes
   image: 
   resource_links:
     - title: Overview of Administration in Docker
@@ -66,4 +67,4 @@ By configuring Docker products to suit your company’s needs, you can optimize
 
 ## Tools integration
 
-Okta, Entra ID SAML 2.0, Azure Connect (OIDC), MDM solutions like Intune
+Okta, Entra ID SAML 2.0, Azure Connect (OIDC), MDM solutions like Intune