Darren Schroeder a46c21cffb
add plugin path when there are no signatures (#10201)
# Description

This PR adds the ability to have a `$nu.plugin-path` even when you
plugins are registered and it also should work with `nu -n --no-stdlib`.

### Before
It would give an error
```
│ plugin-path        │ IOError("Could not get plugin signature location")             │
```

### After
It returns the proper path, like this for me
```
│ plugin-path        │ /Users/fdncred/Library/Application Support/nushell/plugin.nu   │
```

Closed #10198 
# User-Facing Changes
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# Tests + Formatting
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> **Note**
> from `nushell` you can also use the `toolkit` as follows
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2023-09-03 19:19:04 -05:00
..
2023-08-28 09:53:25 +03:00
2023-09-01 09:18:55 +03:00
2022-02-07 14:54:06 -05:00

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.