fix(core): core constructs fail with Error: Cannot find module '../dist/core/<file>.generated' (#28467)

#28251 added new files to `aws-cdk-lib/core/lib/dist/core` but this path was excluded from the npm package, causing the above error.

This fix includes the generated file into the package.

Closes #28465

Manually tested with a locally build package that includes the fix.
<img width="1449" alt="image" src="https://github.com/aws/aws-cdk/assets/379814/11714c41-edea-403e-9b64-454ba9768c08">

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: mrgrain

packages/aws-cdk-lib/.npmignore

@@ -16,6 +16,7 @@ coverage
 build-tools
 dist
 !custom-resource-handlers/dist/
+!core/lib/dist/
 scripts
 .LAST_BUILD
 .LAST_PACKAGE
@@ -30,9 +31,11 @@ tsconfig.json
 # exclude cdk artifacts
 **/cdk.out
 junit.xml
-
 !*.lit.ts
 
+# exclude additional documention
+core/adr/
+
 # keep class map for cloudformation-include
 !cloudformation-include/cfn-types-2-classes.json