Add the Pingvin Share logo (#356)

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## Description

This PR adds the Pingvin Share icon. Pingvin Share is a self-hosted file
sharing platform, their GitHub is
[here](https://github.com/stonith404/pingvin-share) if you want to check
it out.

<!--- Describe your changes in detail -->

## Type of Change

<!--- Put an `x` in all the boxes that apply: -->

- [x] 🖼️ New icon
- [ ] ✨ New feature (non-breaking change which adds functionality)
- [ ] 🛠️ Bug fix (non-breaking change which fixes an issue)
- [ ] ❌ Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] 🧹 Code refactor
- [ ] ✅ Build configuration change
- [ ] 📝 Documentation
- [ ] 🗑️ Chore

assets/custom-icons/_data/custom-icons.json

@@ -133,6 +133,10 @@
       "title": "Peerberry",
       "hex": "03E5A5"
     },
+    {
+      "title": "Pingvin Share",
+      "hex": "485099"
+    },
     {
       "title": "Plutus",
       "hex": "DEC685"

assets/custom-icons/icons/pingvinshare.svg

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg id="Layer_1" data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 943.11 911.62"><script xmlns=""/>
+  <defs>
+    <style>
+      .cls-1 {
+        fill: #fff;
+      }
+
+      .cls-2 {
+        fill: #37474f;
+      }
+
+      .cls-3 {
+        fill: #46509e;
+      }
+    </style>
+  </defs>
+  <ellipse class="cls-3" cx="471.56" cy="454.28" rx="471.56" ry="454.28"/>
+  <g>
+    <g>
+      <ellipse class="cls-2" cx="471.56" cy="390.28" rx="233.66" ry="207"/>
+      <path class="cls-2" d="m705.22,848.95c-36.69,21.14-123.09,64.33-240.64,62.57-109.54-1.63-190.04-41.45-226.68-62.57v-454.19h467.33v454.19Z"/>
+    </g>
+    <path class="cls-1" d="m658.81,397.7v475.8c-36.98,15.7-98.93,36.54-177.98,38.04-88.67,1.69-157.75-21.73-196.2-38.04v-475.8c0-95.55,83.77-173.02,187.09-173.02s187.09,77.47,187.09,173.02Z"/>
+    <polygon class="cls-3" points="565.02 431.68 471.56 514.49 378.09 431.68 565.02 431.68"/>
+    <ellipse class="cls-2" cx="378.09" cy="369.58" rx="23.37" ry="20.7"/>
+    <ellipse class="cls-2" cx="565.02" cy="369.58" rx="23.37" ry="20.7"/>
+    <path class="cls-2" d="m658.49,400.63c0-40.04-36.59-72.45-81.78-72.45s-81.78,32.41-81.78,72.45c0,11.14,2.81,21.65,7.9,31.05h-62.54c5.1-9.4,7.9-19.91,7.9-31.05,0-40.04-36.59-72.45-81.78-72.45s-81.78,32.41-81.78,72.45l-46.73-10.35c0-114.32,104.63-207,233.66-207s233.66,92.69,233.66,207l-46.73,10.35Z"/>
+  </g>
+</svg>