🚀 Update all icons to new standard

ℹ️ This commit updates the sizes of all icons to match the new standard, ensuring consistency throughout the project. The new sizes were determined after careful consideration and testing to improve the overall user experience. All icons have also gotten a SVG counterpart if possible.

svg/rocketchat.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M448 256.2c0-87.2-99.6-153.3-219.8-153.3-18.8 0-37.3 1.6-55.3 4.8-11.1-10.5-24.2-20-38-27.4C61.2 44.2 0 79.4 0 79.4s56.9 47.1 47.6 88.3c-52.3 52.3-52.5 124.1 0 176.6C56.9 385.6 0 432.6 0 432.6s61.2 35.2 134.9-.8c13.8-7.5 26.9-16.9 38-27.4 18 3.2 36.5 4.8 55.3 4.8 120.3-.1 219.8-65.8 219.8-153zm-219.7 124c-23.7 0-46.3-2.8-67.3-7.8-21.3 25.8-68.1 61.7-113.6 50.1 14.8-16 36.7-43.1 32-87.6-27.3-21.4-43.6-48.7-43.6-78.5 0-68.4 86.2-123.9 192.5-123.9S420.8 188 420.8 256.4c0 68.3-86.2 123.8-192.5 123.8zm25.6-123.9c0 14.2-11.5 25.8-25.6 25.8-14.1 0-25.6-11.5-25.6-25.8 0-14.2 11.5-25.8 25.6-25.8 14.1 0 25.6 11.6 25.6 25.8zm88.9 0c0 14.2-11.4 25.8-25.6 25.8-14.1 0-25.6-11.5-25.6-25.8 0-14.2 11.4-25.8 25.6-25.8 14.1 0 25.6 11.6 25.6 25.8zm-177.9 0c0 14.2-11.4 25.8-25.6 25.8-14.1 0-25.6-11.5-25.6-25.8 0-14.2 11.4-25.8 25.6-25.8 14.2 0 25.6 11.6 25.6 25.8z" fill="#fb3c5e"/></svg>