refactor: migrate from Biome to oxlint/oxfmt, remove contact form

- Replace Biome with oxlint + oxfmt (OXC toolchain) for linting and formatting
- Add .oxlintrc.json and .oxfmtrc.json configuration files
- Update VS Code settings and devcontainer to use oxc-vscode extension
- Remove contact form, Resend email integration, and related server action/schema
- Remove unused UI components (accordion, alert, card, tabs, toggle, etc.)

components/video.tsx

@@ -37,14 +37,7 @@ const Video = ({
 
           if (extension === "vtt") {
             return (
-              <track
-                key={file}
-                kind="subtitles"
-                src={file}
-                srcLang="en"
-                label="English"
-                default
-              />
+              <track key={file} kind="subtitles" src={file} srcLang="en" label="English" default />
             );
           } else {
             return <source key={file} src={file} type={`video/${extension}`} />;