fix: support local environment cookie configuration

[gusfcarvalho]

Allows for CCF to work on browsers like Safari on development environment.

[Copilot]

Pull request overview

This PR adds environment-based cookie configuration to support local development with browsers like Safari that have stricter requirements for secure cookies. The changes introduce an Environment configuration field that defaults to "production" and adjusts cookie security settings (Secure flag and SameSite mode) based on whether the environment is set to "local", "dev", or "development".

• Adds Environment field to the Config struct with a default value of "production"
• Modifies cookie configuration in the authentication handler to set less restrictive security settings for development environments
• Binds the new CCF_ENVIRONMENT environment variable

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
internal/config/config.go	Adds Environment field to Config struct and initializes it from environment variable with "production" default
internal/api/handler/auth/auth.go	Implements environment-based cookie configuration, setting Secure=false and SameSite=Lax for dev environments
cmd/root.go	Binds the new environment environment variable to viper configuration

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