Reform metaverse into a project to collate and describe evidence synthesis packages

[nealhaddaway]

We're proposing strong shift for metaverse 2.0 - instead of being a curated set of CRAN packages with developer involvement, we suggest it become a systematic collation and description of core functioning evidence synthesis R packages that can support evidence synthesis. The biggest change along with removing the need for developer buy-in will be the inclusion of non-CRAN R packages. This serves two main benefits:

1. CURRENCY - It ensures that the latest versions of rapidly developing packages are available to users
2. COMPREHENSIVENESS - It admits many more packages that are not (currently) on CRAN

Packages will be identified by systematic searches of GitHub, ESMARConf, ESHackathon, Systematic Review Toolbox and CRAN. Inclusion will depend on an assessment of the package meeting various inclusion criteria (in development). Packages will be categorised, described in a database, and placed on a visual process pipeline to aid use.