feat: upgrade tailwind to version 3 (#2933)

* initial upgrade commit for tailwind

* fix: inconsistensies in button

* fix: various places with conflicts

* final fixes

* fix: dialog header color

* apply review

platform/viewer/tailwind.config.js

@@ -1,18 +1,15 @@
+// Todo: we probably should add external installed extensions/modes here as well.
+
 module.exports = {
-  prefix: '',
-  important: false,
-  separator: ':',
-  purge: {
-    // Note: if you are writing an extension that uses Tailwind classes,
-    // you need to put it here so they are not purged in the production build
-    content: [
-      './src/**/*.{jsx,js,ts,tsx, css}',
-      './node_modules/@ohif/ui/src/**/*.{js,jsx,ts,tsx, css}',
-      '../../node_modules/@ohif/ui/src/**/*.{js,jsx,ts,tsx,css}',
-      '../../node_modules/@ohif/ui/src/**/*.{js,jsx,ts,tsx,css}',
-      '../../node_modules/@ohif/extension-*/src/**/*.{js,jsx,css, ts,tsx}',
-    ],
-  },
+  content: [
+    './src/**/*.{jsx,js,ts,tsx, css}',
+    '../../extensions/**/*.{jsx,js,ts,tsx, css}',
+    '../../modes/**/*.{jsx,js,ts,tsx, css}',
+    './node_modules/@ohif/ui/src/**/*.{js,jsx,ts,tsx, css}',
+    '../../node_modules/@ohif/ui/src/**/*.{js,jsx,ts,tsx,css}',
+    '../../node_modules/@ohif/ui/src/**/*.{js,jsx,ts,tsx,css}',
+    '../../node_modules/@ohif/extension-*/src/**/*.{js,jsx,css, ts,tsx}',
+  ],
   theme: {
     screens: {
       sm: '640px',