Change dependencies to peerDependencies

[vadjs]

Summary

Installation of the package @slack/bolt has next file structure: node_modules/@slack/bolt/node_modules Which brings complexity to the application. Also it makes it impossible to override package versions.

Renaming dependencies -> peerDependencies helps to get rid of this problem.

Closes https://github.com/slackapi/bolt-js/issues/2146#issue-2370583771

Requirements (place an x in each [ ])

• [X] I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• [X] I've read and agree to the Code of Conduct.

[salesforce-cla[bot]]

Thanks for the contribution! Before we can merge this, we need @vadjs to sign the Salesforce Inc. Contributor License Agreement.

[seratch]

For this reason https://github.com/slackapi/bolt-js/issues/2146#issuecomment-2186910368, let me close this PR now. If there are further points to discuss, please join the conversation at #2146