feat(clinepass): add ClinePass provider support

Register clinepass provider (OAuth + API-key) using Cline's
OpenAI-compatible API with 10 curated models, live /v1/models
resolver, refreshCline-based token refresh with workos: prefix,
and dashboard OAuth login handler.

Reference: https://github.com/jellydn/pi-clinepass-provider
Closes #2261

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/api/oauth/[provider]/[action]/route.js

@@ -232,8 +232,8 @@ export async function POST(request, { params }) {
         });
       }
 
-      // Cline uses authorization_code without PKCE. Kimchi returns a browser token.
-      const noPkceExchangeProviders = ["cline", "kimchi"];
+      // Cline and ClinePass use authorization_code without PKCE. Kimchi returns a browser token.
+      const noPkceExchangeProviders = ["cline", "clinepass", "kimchi"];
       if (!code || !redirectUri || (!codeVerifier && !noPkceExchangeProviders.includes(provider))) {
         return NextResponse.json({ error: "Missing required fields" }, { status: 400 });
       }