ILO Resolution 2023 on informal work includes updates to the approach to formal/informal
and work/labour distinctions, especially those of the 'informal economy' and 'informal
market economy'. This commit integrates them.
Zotero auto-exports (with the help of bbt) a bibtex file which contains
the whole library for citation purposes.
Overwrote the existing library and fixed any citations to use new bbt
citation keys.
