Customize UI to differentiate from Chromium's instance

- Rename "Monorail" in the home page's header to "avm99963 bugs".
- Remove <chops-announcement>.
- Remove Chromium logo from the home page background.
- Add markdown support for the vulnz and vulnz-old projects.

GitOrigin-RevId: 57bcf549c1eb7c383d25e6a4790c90337d396e91
diff --git a/static_src/shared/md-helper.js b/static_src/shared/md-helper.js
index da5ac3c..8f90676 100644
--- a/static_src/shared/md-helper.js
+++ b/static_src/shared/md-helper.js
@@ -2,7 +2,7 @@
 import DOMPurify from 'dompurify';
 
 /** @type {Set} Projects that default Markdown rendering to true. */
-export const DEFAULT_MD_PROJECTS = new Set(['monkeyrail', 'monorail', 'fuchsia']);
+export const DEFAULT_MD_PROJECTS = new Set(['vulnz', 'vulnz-old', 'monkeyrail', 'monorail']);
 
 /** @type {Set} Projects that allow users to opt into Markdown rendering. */
 export const AVAILABLE_MD_PROJECTS = new Set([...DEFAULT_MD_PROJECTS]);