Add Bitbucket support

.github/ISSUE_TEMPLATE/bitbucket.md

@@ -0,0 +1,21 @@
+---
+name: Bitbucket
+about: Migrate Bitbucket pipelines to GitHub Actions
+title: "[Bitbucket]:"
+labels: bitbucket
+assignees: ""
+---
+
+## Inputs
+
+Provide the following required inputs:
+
+Workspace: _Replace this text with the Bitbucket Workspace to migrate pipelines from._
+
+## Available commands
+
+The following commands can be executed by adding a comment to this issue:
+
+- `/audit`
+- `/dry-run --repository :repository-name`
+- `/migrate --repository :repository-name --target-url :github-repository-url`