Target Equinox 4.1, Propulsion 3, FsCodec 3

See ChangeLog

Added

• proIndexer: Template demonstrating a reactor app that maintains a summarized form of an Aggregate's state as RollingState in a separated Views Container, with snapshot and sync subcommands #132
• proIndexer: Added export and stats commands; Added file source support #138

Changed

• Target .NET 8 SDK; Target net8.0 for EXEs #136
• Target Equinox v 4.0.0, Propulsion v 3.0.0, FsCodec v 3.0.0 #136
• Target Argu v 6.0.14 #135
• eqxShipping: Clarified reactor logic (removed isValidTransition anti-pattern) #137

Removed

• proCosmosReactor: Extended/split to become proIndexer #132

Targets Equinox v 4.1.0, Propulsion v 3.0.0, FsCodec v 3.0.0