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

* Port to GitHub actions

* Fix

* Make docs terraform registry compatible

docs/data-sources/bitbucketserver_global_permissions_users.md

@@ -0,0 +1,36 @@
+---
+id: data_bitbucketserver_global_permissions_users
+title: bitbucketserver_global_permissions_users
+---
+
+Retrieve a list of users that have been granted at least one global permission.
+
+## Example Usage
+
+```hcl
+data "bitbucketserver_global_permissions_users" "all" { }
+```
+
+### Applying a Custom Filter
+
+Find any users starting with `malcolm`.
+ 
+```hcl
+data "bitbucketserver_global_permissions_users" "malcolms" {
+  filter = "malcolm"
+}
+```
+
+## Argument Reference
+
+* `filter` - Optional. If specified only user's names/emails containing the supplied string will be returned.
+
+## Attribute Reference
+
+* `users` - List of maps containing `name`, `email_address`, `display_name`, `active` and `permission` keys. Available permissions are: `LICENSED_USER`, `PROJECT_CREATE`, `ADMIN`, `SYS_ADMIN`
+
+    * `LICENSED_USER`
+    * `PROJECT_CREATE`
+    * `ADMIN`
+    * `SYS_ADMIN`
+