chore: continued redesign readme

repo-images/header-features.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="860" height="52" viewBox="0 0 860 52">
+  <rect width="860" height="52" fill="none"/>
+  <rect x="0" y="36" width="860" height="1" fill="#F39044" opacity="0.25"/>
+  <rect x="0" y="36" width="106" height="2" fill="#F39044"/>
+  <text x="0" y="28" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif" font-size="22" font-weight="700" fill="#F39044">Features</text>
+</svg>

repo-images/header-overview.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="860" height="52" viewBox="0 0 860 52">
+  <rect width="860" height="52" fill="none"/>
+  <rect x="0" y="36" width="860" height="1" fill="#F39044" opacity="0.25"/>
+  <rect x="0" y="36" width="120" height="2" fill="#F39044"/>
+  <text x="0" y="28" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif" font-size="22" font-weight="700" fill="#F39044">Overview</text>
+</svg>

repo-images/header-platform-support.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="860" height="52" viewBox="0 0 860 52">
+  <rect width="860" height="52" fill="none"/>
+  <rect x="0" y="36" width="860" height="1" fill="#F39044" opacity="0.25"/>
+  <rect x="0" y="36" width="224" height="2" fill="#F39044"/>
+  <text x="0" y="28" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif" font-size="22" font-weight="700" fill="#F39044">Platform Support</text>
+</svg>