Docs: Update docs to new designs (#4917)

# Description of Changes
- Update docs to new designs

<!-- Please describe your change, mention any related tickets, and so on
here. -->

# Screenshots

<img width="1505" height="853" alt="Demo1"
src="https://github.com/user-attachments/assets/227e07d9-8e3b-464f-ad0b-eb39f3f34c63"
/>

<img width="1505" height="854" alt="Demo2"
src="https://github.com/user-attachments/assets/8fdc9418-e41b-477f-a9a2-bc0e075f80ea"
/>

<img width="1508" height="860" alt="Demo3"
src="https://github.com/user-attachments/assets/ad2eed7b-a592-4822-b5d0-165d3d61f30e"
/>

<img width="1501" height="854" alt="Demo4"
src="https://github.com/user-attachments/assets/2ab770d6-005e-44db-ace0-ad09fcced383"
/>

# API and ABI breaking changes

<!-- If this is an API or ABI breaking change, please apply the
corresponding GitHub label. -->

# Expected complexity level and risk
2

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How complicated do you think these changes are? Grade on a scale from 1
to 5,
where 1 is a trivial change, and 5 is a deep-reaching and complex
change.

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the diff,
but also to its interactions with existing and future code.

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and what other components it interacts with in potentially concerning
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# Testing

<!-- Describe any testing you've done, and any testing you'd like your
reviewers to do,
so that you're confident that all the changes work as expected! -->

- [x] Tested the docs with updated designs
- [ ] <!-- maybe a test you want a reviewer to do, so they can check it
off when they're satisfied. -->

---------

Co-authored-by: Tyler Cloutier <cloutiertyler@users.noreply.github.com>

Author: clockwork-tien

docs/docs/00100-intro/00100-getting-started/00200-what-is-spacetimedb.md

@@ -14,14 +14,10 @@ This means that you can write your entire application in a single language and d
   <img
     src="/docs/images/basic-architecture-diagram.png"
     alt="SpacetimeDB Architecture"
-    style={{ width: '100%' }}
   />
-  <figcaption style={{ marginTop: '10px', textAlign: 'center' }} align="center">
-    <b align="center">SpacetimeDB application architecture</b>
-    <span style={{ fontSize: '14px' }}>
-      {' '}
-      (elements in white are provided by SpacetimeDB)
-    </span>
+  <figcaption>
+    <b>SpacetimeDB application architecture</b>
+    <span> Elements in white are provided by SpacetimeDB</span>
   </figcaption>
 </figure>
 
@@ -37,10 +33,9 @@ Speed and latency is achieved by holding all of your application state in memory
   <img
     src="/docs/images/workflow-preview-diagram.png"
     alt="SpacetimeDB Application Workflow Preview"
-    style={{ width: '100%' }}
   />
-  <figcaption style={{ marginTop: '10px', textAlign: 'center' }} align="center">
-    <b align="center">SpacetimeDB Application Workflow Preview</b>
+  <figcaption>
+    <b>SpacetimeDB Application Workflow Preview</b>
   </figcaption>
 </figure>
 

docs/docusaurus.config.ts

@@ -156,9 +156,11 @@ const config: Config = {
     navbar: {
       logo: {
         alt: 'SpacetimeDB Logo',
-        src: 'https://spacetimedb.com/images/brand.svg',
+        src: '/images/brand.svg',
         href: 'https://spacetimedb.com',
         target: '_self',
+        width: 152,
+        height: 32,
       },
       hideOnScroll: false,
       items: [
@@ -197,7 +199,6 @@ const config: Config = {
         },
       ],
     },
-    footer: {},
     prism: {},
     colorMode: {
       disableSwitch: true,