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# Description I spent a while trying to come up with a good name for what is currently `IoStream`. Looking back, this name is not the best, because it: 1. Implies that it is a stream, when it all it really does is specify the output destination for a stream/pipeline. 2. Implies that it handles input and output, when it really only handles output. So, this PR renames `IoStream` to `OutDest` instead, which should be more clear.
Nushell core libraries and plugins
These sub-crates form both the foundation for Nu and a set of plugins which extend Nu with additional functionality.
Foundational libraries are split into two kinds of crates:
- Core crates - those crates that work together to build the Nushell language engine
- Support crates - a set of crates that support the engine with additional features like JSON support, ANSI support, and more.
Plugins are likewise also split into two types:
- Core plugins - plugins that provide part of the default experience of Nu, including access to the system properties, processes, and web-connectivity features.
- Extra plugins - these plugins run a wide range of different capabilities like working with different file types, charting, viewing binary data, and more.