changesets: added changesets for catalog NFS polish

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/brown-pans-guess.md

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+---
+'@backstage/plugin-catalog': patch
+---
+
+Fixed the layout of summary cards in the new frontend system, ensuring that the horizontal scroll grid doesn't grow too large as well as tweaked its scrolling parameters.

.changeset/kind-pianos-fold.md

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+---
+'@backstage/plugin-catalog': patch
+---
+
+The about, links, and labels card now all have the `info` card type by default in the new frontend system.

.changeset/rare-olives-lay.md

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+---
+'@backstage/plugin-catalog-react': patch
+---
+
+Added a new `overview` entity content group for the new frontend system.

.changeset/wet-towns-laugh.md

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+---
+'@backstage/plugin-catalog': patch
+---
+
+The overview content is now part of the overview group by default in the new frontend system.