feat(checker/text_import): import definitions whose type is in Prop as theorems
feat(checker/text_import): import definitions whose type is in Prop as theorems

Kha/lean,rlewis1988/lean,johoelzl/lean,johoelzl/lean,avigad/lean,fpvandoorn/lean,leanprover-community/lean,rlewis1988/lean,leanprover/lean,leodemoura/lean,Kha/lean,avigad/lean,Kha/lean,leodemoura/lean,fpvandoorn/lean,johoelzl/lean,digama0/lean,leanprover-community/lean,leanprover/lean,leanprover-community/lean,digama0/lean,dselsam/lean,leanprover/lean,avigad/lean,digama0/lean,leodemoura/lean,leanprover/lean,johoelzl/lean,digama0/lean,digama0/lean,Kha/lean,dselsam/lean,digama0/lean,avigad/lean,leanprover/lean,fpvandoorn/lean,johoelzl/lean,rlewis1988/lean,leodemoura/lean,leodemoura/lean,dselsam/lean,Kha/lean,dselsam/lean,Kha/lean,rlewis1988/lean,leanprover/lean,rlewis1988/lean,fpvandoorn/lean,rlewis1988/lean,leanprover-community/lean,leodemoura/lean,dselsam/lean,leanprover-community/lean,leanprover-community/lean,avigad/lean,avigad/lean,fpvandoorn/lean,johoelzl/lean,fpvandoorn/lean,dselsam/lean