changesets: add changesets for type parameter changes

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

.changeset/cool-melons-check.md

@@ -0,0 +1,21 @@
+---
+'@backstage/frontend-test-utils': patch
+'@backstage/frontend-app-api': patch
+'@backstage/core-compat-api': patch
+'@backstage/plugin-catalog-import': patch
+'@backstage/plugin-catalog-graph': patch
+'@backstage/plugin-catalog-react': patch
+'@backstage/plugin-user-settings': patch
+'@backstage/plugin-search-react': patch
+'@backstage/plugin-kubernetes': patch
+'@backstage/plugin-scaffolder': patch
+'@backstage/plugin-api-docs': patch
+'@backstage/plugin-devtools': patch
+'@backstage/plugin-techdocs': patch
+'@backstage/plugin-catalog': patch
+'@backstage/plugin-search': patch
+'@backstage/plugin-home': patch
+'@backstage/plugin-org': patch
+---
+
+Updated exports to use the new type parameters for extensions and extension blueprints.

.changeset/flat-kangaroos-push.md

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+---
+'@backstage/frontend-plugin-api': minor
+---
+
+**BREAKING**: Updated the type parameters for `ExtensionDefinition` and `ExtensionBlueprint` to only have a single object parameter. The base type parameter is exported as `ExtensionDefinitionParameters` and `ExtensionBlueprintParameters` respectively. This is shipped as an immediate breaking change as we expect usage of these types to be rare, and it does not affect the runtime behavior of the API.
+
+This is a breaking change as it changes the type parameters. Existing usage can generally be updated as follows:
+
+- `ExtensionDefinition<any>` -> `ExtensionDefinition`
+- `ExtensionDefinition<any, any>` -> `ExtensionDefinition`
+- `ExtensionDefinition<TConfig>` -> `ExtensionDefinition<{ config: TConfig }>`
+- `ExtensionDefinition<TConfig, TConfigInput>` -> `ExtensionDefinition<{ config: TConfig, configInput: TConfigInput }>`
+
+If you need to infer the parameter you can use `ExtensionDefinitionParameters`, for example:
+
+```ts
+import {
+  ExtensionDefinition,
+  ExtensionDefinitionParameters,
+} from '@backstage/frontend-plugin-api';
+
+function myUtility<T extends ExtensionDefinitionParameters>(
+  ext: ExtensionDefinition<T>,
+): T['config'] {
+  // ...
+}
+```
+
+The same patterns apply to `ExtensionBlueprint`.
+
+This change is made to improve the readability of API references and ability to evolve the type parameters in the future.