💄(fonts) use system fonts as default

We don't really need Source Sans as default, system font is enough

src/frontend/panda.config.ts

@@ -190,8 +190,6 @@ const config: Config = {
       fonts: {
         sans: {
           value: [
-            'Source Sans',
-            'Source Sans fallback',
             'ui-sans-serif',
             'system-ui',
             '-apple-system',

src/frontend/src/styles/fonts.css

@@ -1,43 +0,0 @@
-@font-face {
-  font-family: 'Source Sans';
-  src: url('/fonts/sourcesans3-regular-subset.woff2') format('woff2');
-  font-weight: 400;
-  font-style: normal;
-  font-display: swap;
-}
-
-@font-face {
-  font-family: 'Source Sans';
-  src: url('/fonts/sourcesans3-it-subset.woff2') format('woff2');
-  font-weight: 400;
-  font-style: italic;
-  font-display: swap;
-}
-
-@font-face {
-  font-family: 'Source Sans';
-  src: url('/fonts/sourcesans3-bold-subset.woff2') format('woff2');
-  font-weight: 700;
-  font-style: normal;
-  font-display: swap;
-}
-
-@font-face {
-  font-family: 'Source Code Pro';
-  src: url('/fonts/sourcecodepro-regular-subset.woff2') format('woff2');
-  font-weight: 400;
-  font-style: normal;
-  font-display: swap;
-}
-
-/*
-* to reduce CLS
-* values taken from https://github.com/khempenius/font-fallbacks-dataset/blob/main/font-metric-overrides.csv#L2979
-*/
-@font-face {
-  font-family: 'Source Sans fallback';
-  src: local('Arial');
-  ascent-override: 98.4%;
-  descent-override: 27.3%;
-  line-gap-override: 0%;
-}

src/frontend/src/styles/index.css

@@ -1,4 +1,3 @@
-@import './fonts.css';
 @import './livekit.css';
 @layer reset, base, tokens, recipes, utilities;
 html,