Addressing #396

• Updated the certificate creation logic to use public suffixes for domain parsing instead of a simple dot (.) check, improving accuracy for multi-level TLDs (e.g., .co.uk).
• Implemented a cache in the domain resolution process to improve performance, particularly in browsing scenarios where multiple requests to the same hosts occur. This optimization also reduces memory allocations. Cache can be disable with the environment variable NoCacheOnFqdnCompute=1
• Added the public suffix list (public_suffix_list.dat) as a resource file to support accurate domain suffix detection.
• Enabled runtime extension of known public suffixes by allowing dynamic modification of the static PublicSuffixHelper.KnownSuffixes hash set.