Add the jetbrains-gateway module from Coder's registry to each example template in the coder/coder repository to standardize access to JetBrains Gateway and improve developer workflows.

Use version = ">= 1.0.0" to ensure new users automatically get the latest compatible version. This approach will reduce maintenance by avoiding the need for manual version updates.

Include a comment within each template file to inform users that they can pin the module version to prevent breaking changes. Note that modules do not currently follow strict semantic versioning.