Prepare the 1.0 release

[tpritc]

Added

• Configuration system: Use Identifiable.configure to set the overwrite_to_key and overwrite_to_param options that control whether Identifiable overrides Rails' to_key and to_param model methods. Both options default to true to maintain backward compatibility.
• Support for Ruby version 3.2, 3.3, and 3.4.

Changed

• This is now considered a stable 1.0 release.

Removed

• Support for Ruby 2.7, 3.0, and 3.1. The new minimum supported Ruby version is 3.2.
• Support for Rails versions below 7.0. The new minimum supported Rails version is 7.0.

Fixed

• Configuration options resolve compatibility issues with other gems like Devise (ActiveRecord's to_key/to_params override causes issues with devise gem authentication #7).