refactor: update "Explore Docs" buttons across all pages to link to docs.projectmycelium.com

- Changed all "Explore Docs" buttons from internal links to external docs.projectmycelium.com links with target="_blank"
- Updated CloudArchitecture, CloudHeroNew, CloudIntro, GpuHero, NodeHero, StorageHero, and CallToAction components
- Added "Explore Docs" buttons to AgentHeroAlt and ComputeCapabilities components
- Updated HomeBlink, HomeSpotlight, and HomeCTA to use external docs link instead of onClick

src/pages/agents/AgentHeroAlt.tsx

@@ -1,6 +1,7 @@
 'use client'
 
 import { Eyebrow, H3, P } from '@/components/Texts'
+import { Button } from '@/components/Button'
 
 export function AgentHeroAlt() {
   return (
@@ -33,6 +34,16 @@ Private, local, and autonomous by design, they give you everything you need to b
             <div className="mt-10 flex items-center gap-x-6">
               {/* TODO: Hero CTAs (Follow Development / Explore Docs) to be added when links are ready.
                   Previously two Buttons here with href="#". */}
+              <Button
+                variant="solid"
+                color="cyan"
+                as="a"
+                to="https://docs.projectmycelium.com/ai-agent-framework/"
+                target="_blank"
+                rel="noreferrer noopener"
+              >
+                Explore docs
+              </Button>
             </div>
           </div>
         </div>