Add codegen diff visual (#38)

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* Automated pre-commit update

Author: vishalshenoy

examples/dict_to_schema/README.md

@@ -2,6 +2,9 @@
 
 This example demonstrates how to automatically convert Python dictionary literals into Pydantic models. The codemod makes this process simple by handling all the tedious manual updates automatically.
 
+> [!NOTE]
+> View example transformations created by this codemod on the `modal-labs/modal-client` repository [here](https://www.codegen.sh/codemod/6b5f2dfa-948a-4953-b283-9bd4b8545632/public/diff).
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 ## How the Conversion Script Works
 
 The script (`run.py`) automates the entire conversion process in a few key steps:

examples/freezegun_to_timemachine_migration/README.md

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- FreezeGun to TimeMachine Migration Example
+# FreezeGun to TimeMachine Migration Example
 
 This example demonstrates how to use Codegen to automatically migrate test code from FreezeGun to TimeMachine for time mocking. The migration script makes this process simple by handling all the tedious manual updates automatically.
 

examples/usesuspensequery_to_usesuspensequeries/README.md

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 This example demonstrates how to use Codegen to automatically convert multiple `useSuspenseQuery` calls to a single `useSuspenseQueries` call in React codebases. The migration script makes this process simple by handling all the tedious manual updates automatically.
 
+> [!NOTE]
+> View example transformations created by this codemod on the `deepfence/ThreatMapper` repository [here](codegen.sh/codemod/a433152e-5e8d-4319-8043-19ff2b418869/public/diff).
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 ## How the Migration Script Works
 
 The script automates the entire migration process in a few key steps: