Refactor documentation and update Docusaurus configuration

- Removed the 'APIs' dropdown from the sidebar in `docusaurus.config.js` to streamline navigation.
- Enhanced the description of Pomerium in `index.mdx` to clarify its functionality, emphasizing the verification of user identity, device state, and request context.
- Improved formatting and clarity in the documentation, ensuring consistent terminology and readability.

These changes enhance the overall usability and clarity of the documentation, providing users with a more coherent resource for understanding Pomerium's capabilities.

Author: desimone

content/docs/index.mdx

@@ -19,16 +19,16 @@ keywords:
 
 # What is Pomerium?
 
-Pomerium is an open source identity-aware proxy built around the principles of [BeyondCorp](https://research.google/pubs/pub43231) and [zero trust](https://www.nist.gov/publications/zero-trust-architecture). It secures your internal applications by continually verifying a user's identity, device state, and context before granting access.
+Pomerium is an open source identity-aware proxy built around the principles of [BeyondCorp](https://research.google/pubs/pub43231) and [zero trust](https://www.nist.gov/publications/zero-trust-architecture). It secures your internal applications, servers, services, and workloads by continually verifying a user's **identity**, **device state**, and **request context** before granting access.
 
-Unlike VPN or tunnel-based approaches, Pomerium provides a scalable, modern alternative that centralizes access policy without requiring client software.
+Unlike VPN or tunnel-based approaches, Pomerium provides a scalable, modern alternative that centralizes access policy **without requiring client software**.
 
 Key benefits:
 
 - **Seamless, clientless access**: No corporate VPN to install or maintain.
 - **Granular enforcement**: Every request is authenticated and authorized.
 - **Adaptable**: Works across multiple environments (cloud, on-prem, hybrid).
-- **Open source pedigree**: Built on the BeyondCorp model. Transparent, with an active community.
+- **Open source**: Built on the BeyondCorp model. Transparent, with an active community.
 
 ## How does it work?
 

docusaurus.config.js

@@ -119,23 +119,6 @@ const config = {
           label: 'Reference',
           to: '/docs/reference/',
         },
-        {
-          type: 'dropdown',
-          position: 'right',
-          label: 'APIs',
-          items: [
-            {
-              docId: 'docs/api',
-              label: 'Zero API',
-              to: '/docs/api/',
-            },
-            {
-              docId: 'docs/capabilities/enterprise-api',
-              label: 'Enterprise API',
-              to: 'docs/capabilities/enterprise-api',
-            },
-          ],
-        },
         {
           type: 'docSidebar',
           sidebarId: 'guides',