docs: update icon & make it display in landing page

apps/www/public/images/logos/frameworks/kotlin.svg

@@ -1 +1 @@
-<svg data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 125 125" width="2500" height="2500"><defs><linearGradient id="b" x1="-21.045" y1="114.925" x2="95.274" y2="-1.395" gradientUnits="userSpaceOnUse"><stop offset=".108" stop-color="#c757bc"/><stop offset=".173" stop-color="#cd5ca9"/><stop offset=".492" stop-color="#e8744f"/><stop offset=".716" stop-color="#f88316"/><stop offset=".823" stop-color="#ff8900"/></linearGradient><linearGradient id="a" x1="39.893" y1="147.552" x2="96.589" y2="90.856" gradientUnits="userSpaceOnUse"><stop offset=".296" stop-color="#00afff"/><stop offset=".694" stop-color="#5282ff"/><stop offset="1" stop-color="#945dff"/></linearGradient><linearGradient id="c" x1="-1.501" y1="34.501" x2="38.272" y2="-5.273" xlink:href="#a"/></defs><title>icon_Kotlin</title><path fill="url(#b)" d="M62.759 0L0 65.999V125l62.669-62.779L125 0H62.759z"/><path data-name="&lt;Path&gt;" fill="url(#a)" d="M0 125l62.669-62.778L125 125H0z"/><path fill="url(#c)" d="M0 0h62.759L0 65.999V0z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0,0,256,256" width="48px" height="48px" fill-rule="nonzero"><g fill="#7e7e7e" fill-rule="nonzero" stroke="none" stroke-width="1" stroke-linecap="butt" stroke-linejoin="miter" stroke-miterlimit="10" stroke-dasharray="" stroke-dashoffset="0" font-family="none" font-weight="none" font-size="none" text-anchor="none" style="mix-blend-mode: normal"><g transform="scale(10.66667,10.66667)"><path d="M2,3v18h19.41406l-9,-9l9,-9zM4,5h4.58594l-4.58594,4.58594zM11.41406,5h5.17188l-6.29297,6.29297l-0.70703,0.70703l-5.58594,5.58594v-5.17188zM11,13.41406l5.58594,5.58594h-11.17188z"></path></g></g></svg>