Allow more brod config options

[TylerWitt]

auto_start_producers and allow_topic_auto_creation are no longer hard coded, and can be configured per client (producer or consumer).

This also bumps the version to 1.28.0

Resolves #151

[Copilot]

Pull Request Overview

This PR allows configuration of auto_start_producers and allow_topic_auto_creation options for brod clients instead of having them hard-coded, and bumps the library version to 1.28.0.

• Made auto_start_producers and allow_topic_auto_creation configurable per client
• Updated version from 1.27.2 to 1.28.0
• Added changelog entry documenting the new configuration options

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
mix.exs	Version bump to 1.28.0
lib/kaffe/config/producer.ex	Made producer config options configurable with defaults
lib/kaffe/config/consumer.ex	Made consumer config options configurable with defaults
CHANGELOG.md	Added entry for 1.28.0 release documenting new configuration options

[Copilot]

The changelog entry should provide more specific guidance on how to configure these options. Consider adding examples of the configuration syntax or referencing documentation that explains the configuration format.

Suggested change

	Example configuration:
	```elixir
	config :my_app, :brod,
	clients: [
	my_client: [
	auto_start_producers: false,
	allow_topic_auto_creation: true
	]
	]

For more details, see the brod client configuration documentation.

[TylerWitt]

Resolves #22

[fatcatt316]

Thanks for knocking out that issue! The code makes sense to me, and keeps the old defaults.

[fatcatt316]

Nice! Do you think it's worth telling what the default is if they're not specified? Maybe it's clear enough for someone to just look at the code 🤔