fix: mistake in error management

fix: automatically camelCase all properties of each oa locations (instead of using a fixed list)

feat(camelcase): converted the unpaywall enrichment objects to camelcase before inserting them in the docObjects

chore(fomatting): fixed linter issues + added a .editorconfig file

fix: enrichment was associated with wrong docObject (bad doc index computing)

feat: add log information when DOI not available

add retry option and remove lockfile from gitignone

feat: group 100 DOI by WS call (finalJob usage)

docs: add documentation, feat: add error handler

test: update unit test

feat: first commit v.0