docs: add edit this page component

Author: aksiome

docs/user_guide/customisation/components/edit-this-page.md

@@ -0,0 +1,61 @@
+# ✏️ Edit this page
+
+Display an "Edit this page" link allowing readers to contribute fixes directly on your repository.
+
+## Configuration
+
+Configure edit links via `html_context` in `conf.py`. Breeze supports GitHub, GitLab, and Bitbucket out of the box.
+
+### GitHub
+
+```python
+html_context = {
+    "github_user": "your-username",
+    "github_repo": "your-repo",
+    "github_version": "main",
+    "doc_path": "docs",
+}
+```
+
+### GitLab
+
+```python
+html_context = {
+    "gitlab_user": "your-username",
+    "gitlab_repo": "your-repo",
+    "gitlab_version": "main",
+    "doc_path": "docs",
+}
+```
+
+### Bitbucket
+
+```python
+html_context = {
+    "bitbucket_user": "your-username",
+    "bitbucket_repo": "your-repo",
+    "bitbucket_version": "main",
+    "doc_path": "docs",
+}
+```
+
+## Configuration options
+
+| Key | Description |
+|-----|-------------|
+| `{provider}_user` | Your username or organization name |
+| `{provider}_repo` | Repository name |
+| `{provider}_version` | Branch name (defaults to `main`) |
+| `doc_path` | Path to documentation folder within your repository |
+
+## Custom source URL
+
+For self-hosted instances or other providers, use a custom URL pattern with `%s` as placeholder for the file path:
+
+```python
+html_context = {
+    "source_url": "https://git.example.com/user/repo/edit/main/docs/%s",
+}
+```
+
+The `%s` placeholder is replaced with the full path to the source file (e.g., `user_guide/quickstart.md`).