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/format-data/_index.md

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+title = "Format data using value mapping"
+aliases = ["/docs/grafana/latest/panels/value-mappings/", "/docs/sources/panels/format-data/"]
+weight = 600
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+
+# Format data using value mapping
+
+In addition to field overrides, value mapping is a technique that you can use to change the visual treatment of data that appears in a visualization.
+
+{{< section >}}