documents : change crate structure & migrate regex -> pest

Cargo.lock

blockchain/apply_valid_block.rs

blockchain/check_and_apply_block.rs

blockchain/dbex.rs

blockchain/lib.rs

blockchain/revert_block.rs

blockchain/ts_parsers.rs

dal/block.rs

dal/currency_params.rs

dal/dal_event.rs

dal/dal_requests.rs

dal/identity.rs

dal/lib.rs

dal/parsers/certifications.rs

dal/parsers/revoked.rs

dal/sources.rs

dal/writers/block.rs

dal/writers/certification.rs

dal/writers/dividend.rs

dal/writers/identity.rs