Allow exclusion of specific hosts/subdomains

Problem/Motivation

The Language Selection Page module currently applies language selection logic to all requests, regardless of the domain or subdomain. This can cause unintended redirects on admin panels, staging environments, or other subdomains where language selection is not necessary.

For example, when using Cloudflare:

• domain.com is routed through Cloudflare and benefits from its caching and optimizations.
• admin.domain.com is bypassing Cloudflare but still gets affected by the module’s redirects, which may not be necessary or desired.

Proposed resolution

Introduce a configuration option that allows excluding specific hosts/subdomains from the module’s behavior.