Docs/panel refactor (#43569)

* new refactored panel docs

* fixed links

* removed xtra sharing link, added links to panel display option tasks

* fixed typo

* add aliases

* incorporate PM feedback

* intermediate commit to resolve merge conflict

* final changes to resolve merge conflicts

docs/sources/panels/transform-data/_index.md

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+title = "Transform data"
+aliases = ["/docs/grafana/latest/panels/transformations/", "/docs/grafana/latest/panels/transformations/config-from-query/", "/docs/grafana/latest/panels/transformations/rows-to-fields/", "/docs/grafana/latest/panels/transformations/apply-transformations/", "/docs/sources/panels/transform-data/"]
+weight = 500
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+
+# Transform data
+
+Transformations are a powerful way to manipulate data returned by a query before the system applies a visualization.
+
+With transformations, you can:
+
+- Rename fields
+- Join time series data
+- Perform mathematical operations across queries
+- Use the output of one transformation as the input to another transformation
+
+This section includes the following topics:
+
+{{< section >}}