feat(styles): replaced JetBrainsMono font

SImilar to Inter font, included JetBrains Mono into codex-ui package

Author: TheGeniusOfEternity

codex-ui/src/fonts/JetBrainsMono/JetBrainsMono-Bold.woff2

@@ -0,0 +1,20 @@
+@font-face {
+  font-family: 'JetBrains Mono';
+  font-style: normal;
+  font-weight: 400;
+  src: local("JetBrains Mono Regular"), local("JetBrainsMono-Regular"), url("JetBrainsMono-Regular.woff2") format("woff2");
+  font-display: swap; }
+
+@font-face {
+  font-family: 'JetBrains Mono';
+  font-style: normal;
+  font-weight: 600;
+  src: local("JetBrains Mono SemiBold"), local("JetBrainsMono-SemiBold"), url("JetBrainsMono-SemiBold.woff2") format("woff2"); ;
+}
+
+@font-face {
+  font-family: 'JetBrains Mono';
+  font-style: normal;
+  font-weight: 700;
+  src: local("JetBrains Mono Bold"), local("JetBrainsMono-Bold"), url("JetBrainsMono-Bold.woff2") format("woff2");
+  font-display: swap; }

codex-ui/src/fonts/JetBrainsMono/JetBrainsMono-Regular.woff2

@@ -1,5 +1,5 @@
 @import url('../fonts/Inter/inter.css');
-@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono&display=swap');
+@import url('../fonts/JetBrainsMono/JetBrainsMono.css');
 
 /**
  * Fonts setup