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

* Port to GitHub actions

* Fix

* Make docs terraform registry compatible

docs/resources/bitbucketserver_repository_permissions_user.md

@@ -0,0 +1,33 @@
+# Resource: bitbucketserver_repository_permissions_user
+
+Set repository permissions for a given user.
+
+## Example Usage
+
+```hcl
+resource "bitbucketserver_repository_permissions_user" "mreynolds-repo" {
+  project    = "MYPROJ"
+  repository = "repo1"
+  user       = "mreynolds"
+  permission = "REPO_WRITE"
+}
+```
+
+## Argument Reference
+
+* `project` - Required. Project key the repository is contained within.
+* `repository` - Required. Repository slug to set the permissions for.
+* `user` - Required. Name of the user permissions are for.
+* `permission` - Required. The permission to grant. Available project permissions are:
+                                                    
+    * `REPO_READ`
+    * `REPO_WRITE`
+    * `REPO_ADMIN`
+
+## Import
+
+Import a group project level permissions via the project & group names:
+
+```
+terraform import bitbucketserver_repository_permissions_user.test MYPROJ/repo1/mreynolds
+```