feat: add knip configuration file and integrate knip for linting; update package.json and package-lock.json for new dependencies; refactor various interfaces to remove export modifiers; delete unused hover-card component

src/main/ai/token.ts

@@ -100,7 +100,7 @@ export async function setToken(providerName: string, token: string): Promise<voi
 }
 
 /** Delete a stored token for the given provider. */
-export async function deleteToken(providerName: string): Promise<boolean> {
+async function deleteToken(providerName: string): Promise<boolean> {
   if (useKeytar()) {
     try {
       return await keytar!.deletePassword(SERVICE_NAME, providerName);