stdlib/bats: implemented integration tests

Signed-off-by: Sam Alba <samalba@users.noreply.github.com>

stdlib/.dagger/env/bats/.gitignore

@@ -0,0 +1,2 @@
+# dagger state
+state/**

stdlib/.dagger/env/bats/values.yaml

@@ -0,0 +1,27 @@
+plan:
+    package: ./bats/tests
+name: bats
+inputs:
+    TestBats.source:
+        dir:
+            path: ./bats/tests/testfile
+sops:
+    kms: []
+    gcp_kms: []
+    azure_kv: []
+    hc_vault: []
+    age:
+        - recipient: age1gxwmtwahzwdmrskhf90ppwlnze30lgpm056kuesrxzeuyclrwvpsupwtpk
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBlcFZKTkhBdy95aW1uTDdq
+            OFdiMEtFcUt2UWY4bGR1R2RMOVhGaTc2L3drCjNyTEdjK3hDNEk5U1B6MVZqU3hn
+            V1BnUHRKMktEVEFlWkJvS3YyeUpSY1kKLS0tIGIxQTdRUkZmR0lPRDN1RTgxN2RE
+            b05uK3JiMU5Edmg2WXMvWklKWW1rYzQKXMFWBurdM3edyKq1uifIF6RXLsUaFuwP
+            hYwgmcFroCYdNILt0sPgzOCQntWQevZIqITqs1vhvnxNgzDOONY7tg==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2021-12-14T00:03:36Z"
+    mac: ENC[AES256_GCM,data:4fAHWs24hyuGNjM3XryPXUPd2lPsQP4dvsjbEStrbZtlbEY7wP31W9ZfBXTeU92t1ocpEmcsqsR9ihQnBndvhyY5bXhdFglWV54K83R6xDAZjGknIPilvwtt/VkEZg2uSGvu6VO7MlX4hZlO6YJ7dN1EAQxmQW6yG6POuSchPfE=,iv:fPim6bWX7KqE0DS7bLBHanl4DX+EBBijvltKQl7fo8s=,tag:GWKAre5MzXtRjlCEH4yFIA==,type:str]
+    pgp: []
+    encrypted_suffix: secret
+    version: 3.7.1