feat: add oxford dict extractor (#119)
The OxfordDictExtractor project would extract the senses from oxford advanced learner's dictionary for words in wordlist Oxford 3000 & Oxford 5000. The output files are mainly used in https://my.eudic.net/recite/userbooks & Anki flashcard.
* feat: add oxford dict extractor project
* chore: add some examples for extracted words
* feat: store wordlist.tsv.zip
* feat: load from wordlist.tsv.zip
* feat: oxford dict extractor can work
* feat: gen oxford3000 a1 words
* feat: gen with html style
* chore: add more examples
* feat: merge entry level grammar/labels
* feat: gen with dis-g & cf
* feat: improve gen result
* feat: improve gen result & add more cases
