Migrate Spring annotations to JSpecify

[sullis]

What's changed?

add Spring Annotations migration recipe to jspecify.yml

What's your motivation?

Anything in particular you'd like reviewers to focus on?

n/a

Anyone you would like to review specifically?

n/a

Have you considered any alternatives or workarounds?

Any additional context

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[github-actions]

Some suggestions could not be made:

• src/main/java/org/openrewrite/java/migrate/util/MigrateCollectionsSingletonList.java
  • lines 18-19

[timtebeek]

Looks great! Thanks for immediately testing the nested case as well. :)