(core) Added flags for chinese and italian languages

Summary: SVG flags icons for Italian and simplified Chinese

Test Plan: no new test added; no test changed

Reviewers: jarek

Reviewed By: jarek

Differential Revision: https://phab.getgrist.com/D3851

static/icons/locales/HANS.svg

@@ -0,0 +1,12 @@
+<svg width="16" height="12" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <mask id="a" maskUnits="userSpaceOnUse" x="0" y="0" width="16" height="12">
+    <path fill="#fff" d="M0 0h16v12H0z"/>
+  </mask>
+  <g mask="url(#a)" fill-rule="evenodd" clip-rule="evenodd">
+    <path d="M0 0h16v12H0V0z" fill="#E31D1C"/>
+    <path d="M3.557 4.878L1.61 6.403l.744-2.307-1.299-1.2 1.758-.065.744-1.857.744 1.857h1.754L4.76 4.096l.59 2.307-1.793-1.525zm3.951-1.792l-.817.493.187-.962-.68-.72.92-.04.39-.898.39.899h.92l-.68.759.205.962-.835-.493z" fill="#FECA00"/>
+    <path d="M8.508 5.086l-.817.493.187-.962-.68-.72.92-.04.39-.898.39.899h.92l-.68.759.205.962-.835-.493z" fill="#FECA00"/>
+    <path d="M7.508 7.086l-.817.493.187-.962-.68-.72.92-.04.39-.898.39.899h.92l-.68.759.205.962-.835-.493z" fill="#FECA00"/>
+    <path d="M5.508 8.086l-.817.493.187-.962-.68-.72.92-.04.39-.898.39.899h.92l-.68.759.205.962-.835-.493z" fill="#FECA00"/>
+  </g>
+</svg>

static/icons/locales/IT.svg

@@ -0,0 +1,10 @@
+<svg width="16" height="12" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <mask id="a" maskUnits="userSpaceOnUse" x="0" y="0" width="16" height="12">
+    <path fill="#fff" d="M0 0h16v12H0z"/>
+  </mask>
+  <g mask="url(#a)" fill-rule="evenodd" clip-rule="evenodd">
+    <path d="M11 0h5v12h-5V0z" fill="#C51918"/>
+    <path d="M0 0h6v12H0V0z" fill="#5EAA22"/>
+    <path d="M5 0h6v12H5V0z" fill="#fff"/>
+  </g>
+</svg>