Port to GitHub actions & publish to Terraform registry (#39)

* Port to GitHub actions

* Fix

* Make docs terraform registry compatible

docs/resources/bitbucketserver_global_permissions_group.md

@@ -0,0 +1,25 @@
+# Resource: bitbucketserver_global_permissions_group
+
+Set global permissions for a given group.
+
+## Example Usage
+
+```hcl
+resource "bitbucketserver_global_permissions_group" "test" {
+  group      = "stash-users"
+  permission = "ADMIN"
+}
+```
+
+## Argument Reference
+
+* `group` - Required. Name of the group permissions are for.
+* `permission` - Required. The permission to grant. Available global permissions are: `LICENSED_USER`, `PROJECT_CREATE`, `ADMIN`, `SYS_ADMIN`
+
+## Import
+
+Import a group global permissions via the group name:
+
+```
+terraform import bitbucketserver_global_permissions_group.test my-group
+```