data struct with codepoint builder for radicals

[opnuub]

Added:

• components/segmenter/src/complex/boost/radicals.rs | template to codepointTrie for future use (boost is named for future-proof)
• components/segmenter/src/provider/radicals.rs | data struct

Modified:

• components/segmenter/src/provider/mod.rs | added two lines to use radicals.rs also in provider
• provider/source/src/segmenter/unihan.rs | added data provider and test for new codepoint trie