0.5.0

Full Changelog: 0.4.0...0.5.0

• Added /set_model command to change the model.
• Added /get_models command to get a list of all available free models.
• Added a response message about request processing (download status) when sending messages to the bot.
• Added sending an error message when processing a request.
• Added parameters to the env example for settings the model.
• Updated all packages and Go version to 1.25.0.
• Added application build and publication to Docker Hub via Actions.
• Added a simple helm chart (parameterized .env file) for installing the bot in a Kubernetes cluster.