feat(docs): migrate bs docs

blocksuite/docs-site/components/blocks/divider-block.md

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+# Divider Block
+
+This is a block used to display a divider line. It can be quickly obtained by typing `---` followed by pressing the space bar.
+
+## Reference
+
+- [`DividerBlockSchema`](/api/@blocksuite/blocks/variables/DividerBlockSchema.html)