docs: link root CONTRIBUTING.md to existing docs and add semantic-pr-release-drafter references

Co-Authored-By: AJ Steers <aj@airbyte.io>

Author: devin-ai-integration[bot]

CONTRIBUTING.md

@@ -2,8 +2,10 @@
 
 Thank you for your interest in contributing to the Airbyte Python CDK!
 
+For detailed development setup, testing, and other guidelines, please see the full [Contributing Guide](./docs/CONTRIBUTING.md).
+
 ## 🚀 Releasing
 
 This project uses [`semantic-pr-release-drafter`](https://github.com/aaronsteers/semantic-pr-release-drafter) for automated release management. To release, simply click "`Edit`" on the latest release draft from the [releases page](https://github.com/airbytehq/airbyte-python-cdk/releases), and then click "`Publish release`". This publish operation will trigger all necessary downstream publish operations.
 
-ℹ️ For more detailed instructions, please see the [Releasing Guide](https://github.com/aaronsteers/semantic-pr-release-drafter/blob/main/docs/releasing.md).
+ℹ️ For more detailed instructions, please see the [Releasing Guide](https://github.com/aaronsteers/semantic-pr-release-drafter/blob/main/docs/releasing.md) and the [Release Management Guide](./docs/RELEASES.md).

docs/CONTRIBUTING.md

@@ -95,7 +95,9 @@ The `docs-generate` Poe task is mapped to the `run()` function of `docs/generate
 
 ## Release Management
 
-Please see the [Release Management](./RELEASES.md) guide for information on how to perform releases and pre-releases.
+This project uses [`semantic-pr-release-drafter`](https://github.com/aaronsteers/semantic-pr-release-drafter) for automated release management. For more information, see the [Releasing Guide](https://github.com/aaronsteers/semantic-pr-release-drafter/blob/main/docs/releasing.md).
+
+Please also see the [Release Management](./RELEASES.md) guide for repo-specific information on how to perform releases and pre-releases.
 
 ## FAQ