cue modules: move stdlib to pkg/alpha.dagger.io

In preparation for Europa, we will vendor multiple CUE modules:

- `pkg/alpha.dagger.io`: legacy non-europa packages
- `pkg/dagger.io`: core Europa packages
- `pkg/universe.dagger.io`: Europa universe

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

pkg/alpha.dagger.io/.dagger/env/docker-push-invalid-creds/values.yaml

@@ -0,0 +1,28 @@
+plan:
+    package: ./docker/tests/push-invalid-creds
+name: docker-push-invalid-creds
+inputs:
+    TestRegistry.secret:
+        secret: ENC[AES256_GCM,data:+gCg3g==,iv:TVQBLFvC1T+xNSJdmhEz+0cciIpCbo6D+twwghUU0ik=,tag:R7SoByjnyj6Aupw1/6c+8w==,type:str]
+    TestRegistry.username:
+        text: invalid
+sops:
+    kms: []
+    gcp_kms: []
+    azure_kv: []
+    hc_vault: []
+    age:
+        - recipient: age1gxwmtwahzwdmrskhf90ppwlnze30lgpm056kuesrxzeuyclrwvpsupwtpk
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSA4czBwNGtSdGZqdEZ5WDlM
+            SHVYOU5zdFl4L2ptZk5rSHgwek1aaDNicENFCkJ4OUIweU5OZTVKalpTSkhYaGxB
+            RUpHZmVvU3g3Y2tBZnRUcHh0TE52M1EKLS0tIHI1VUt1aUR0a0tDNHJVTHY4eEt1
+            VC8wSTZvUE5UaDg2WE1CaGMzR3M1TEkK9v83AVI4lvFgjKCg8UmQrcxarlESWTfV
+            2cDdWgoH7ZqgXo5jFv2tn8qQWHKl8eTTeYUWn8GoNVPKrCroax2fiQ==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2021-08-31T10:07:27Z"
+    mac: ENC[AES256_GCM,data:sdycrW51n0tHL76DroLAUR33Fis5Hixn6dQ7LofNoIcdAj334MTWIf0jxnbzrv4Dkm/MsU90asiGwQyHI56t8mBUqrLJmd8PBE/t6S4RghCAIlM3mcHB4iHsC8Sib2URn3wKztcIuobfU8e9IvZoW4X8R/QWc1jWNmIt8VGdwfw=,iv:g7ri14SRxhsd1SSibYzDig6mZRG7LJ+R6CPDNmNOAfI=,tag:wM1DVa3LL9zFcHKAJJjugg==,type:str]
+    pgp: []
+    encrypted_suffix: secret
+    version: 3.7.1