add changesets

Signed-off-by: Emma Indal <emma.indahl@gmail.com>

.changeset/techdocs-breezy-pans-flow.md

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+---
+'@backstage/plugin-techdocs-node': patch
+---
+
+Deprecations cleaned up.
+
+- `DirectoryPreparer` now uses private constructor. Use static fromConfig method to instantiate.
+- `UrlPreparer` now uses private constructor. Use static fromConfig method to instantiate.

.changeset/techdocs-clever-pumas-warn.md

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+---
+'@backstage/plugin-techdocs-backend': patch
+---
+
+Deprecations cleaned up.
+
+- deprecated config `generators` is now deleted and fully replaced with `techdocs.generator`
+- deprecated config `generators.techdocs` is now deleted and fully replaced with `techdocs.generator.runIn`
+- deprecated config `techdocs.requestUrl` is now deleted
+- deprecated config `techdocs.storageUrl` is now deleted
+- deprecated `createHttpResponse` is now deleted and calls to `/sync/:namespace/:kind/:name` needs to be done by an EventSource.

.changeset/techdocs-tiny-spies-knock.md

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+---
+'@backstage/plugin-techdocs': patch
+---
+
+Deprecations cleaned up.
+
+- deprecated `DocsResultListItem` is now deleted and fully replaced with `TechDocsSearchResultListItem`
+- deprecated `TechDocsPage` is now deleted and fully replaced with `TechDocsReaderPage`
+- deprecated `TechDocsPageHeader` is now deleted and fully replaced with `TechDocsReaderPageHeader`
+
+- deprecated `TechDocsPageHeaderProps` is now deleted and fully replaced with `TechDocsReaderPageHeaderProps`
+- deprecated `TechDocsPageRenderFunction` is now deleted and fully replaced with `TechDocsReaderPageRenderFunction`
+- deprecated config `techdocs.requestUrl` is now deleted and fully replaced with the discoveryApi