feat: improve headers

Author: jleveugle

packages/manager/apps/public-cloud/src/assets/theme/_typography.less

@@ -6,3 +6,22 @@ h1 {
   color: @text-color;
   font-weight: 400;
 }
+
+h2 {
+  font-size: 28px;
+  line-height: 35px;
+  color: @text-color;
+  font-weight: normal;
+}
+
+h3 {
+  font-size: 20px;
+  line-height: 25px;
+  font-weight: bold;
+  color: @text-color;
+}
+
+p {
+  color: rgb(77, 111, 146);
+  line-height: 24px;
+}