Salmanap/chrome extension routing (#511)

* first commit of the chatGPT selector

* stashing changes as checkpoint

* pending changes for chrome extension

* commiting a working version

* converting conversation into messages object

* working version of the extension

* working version with fixed styling and better tested

* fixed the issue that the drop down was too small, and fixed the issue where the route was not displayed on the screen

* updating folder with README.md

* fixes for default model, and to update the manifest.json file

* made changes to the dark mode. improved styles

* fix installation bug

* added dark mode

* fixed default model selection

* fixed the scrolling issue

* Update README.md

* updated content.js to update the labels even when default model

* fixed readme

* upddated the title of the packag

* removing the unnecessary permissions

---------

Co-authored-by: Salman Paracha <salmanparacha@MacBook-Pro-329.local>
Co-authored-by: cotran <cotran2@utexas.edu>
Co-authored-by: Shuguang Chen <54548843+nehcgs@users.noreply.github.com>

demos/use_cases/chatgpt-preference-model-selector/src/index.css

@@ -0,0 +1,12 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}