chore(login): migrate nextjs login to monorepo (#10134)

# Which Problems Are Solved

We move the login code to the zitadel repo.

# How the Problems Are Solved

The login repo is added to ./login as a git subtree pulled from the
dockerize-ci branch.
Apart from the login code, this PR contains the changes from #10116

# Additional Context

- Closes https://github.com/zitadel/typescript/issues/474
- Also merges #10116  
- Merging is blocked by failing check because of:
- https://github.com/zitadel/zitadel/pull/10134#issuecomment-3012086106

---------

Co-authored-by: Max Peintner <peintnerm@gmail.com>
Co-authored-by: Max Peintner <max@caos.ch>
Co-authored-by: Florian Forster <florian@zitadel.com>

e2e/config/host.docker.internal/zitadel.yaml

@@ -60,6 +60,9 @@ Projections:
 DefaultInstance:
   LoginPolicy:
     MfaInitSkipLifetime: "0"
+  Features:
+    LoginV2:
+      Required: false
 
 SystemAPIUsers:
 - cypress:

e2e/config/localhost/zitadel.yaml

@@ -52,6 +52,9 @@ Quotas:
 DefaultInstance:
   LoginPolicy:
     MfaInitSkipLifetime: "0"
+  Features:
+    LoginV2:
+      Required: false
 
 SystemAPIUsers:
 - cypress: