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

* Port to GitHub actions

* Fix

* Make docs terraform registry compatible

docs/data-sources/bitbucketserver_application_properties.md

@@ -0,0 +1,16 @@
+# Data Source: bitbucketserver_application_properties
+
+This data source allows you to retrieve version information and other application properties of Bitbucket Server.
+
+## Example Usage
+
+```hcl
+data "bitbucketserver_application_properties" "main" { }
+```
+
+## Attribute Reference
+
+* `version` - Version of Bitbucket.
+* `build_number` - Build number of the Bitbucket instance.
+* `build_date` - Date the Bitbucket build was made,
+* `display_name` - Name of the Bitbucket instance.