Brooks Rady 351bff8233
fix(shell_integration): set window title on startup (#12569)
Should close #10833 — though I'd imagine that should have already been
closed.

# Description

Very minor tweak, but it was quite noticeable when using Zellij which
relies on OSC 2 to set pane titles. Before the change:

![image](https://github.com/nushell/nushell/assets/6251883/b944bbce-2040-4886-9955-3c5b57d368e9)

Note that the default `Pane #1` is still showing for the untouched
shell, but running a command like `htop` or `ls` correctly sets the
title during / afterwards.

After this PR:

![image](https://github.com/nushell/nushell/assets/6251883/dd513cfe-923c-450f-b0f2-c66938b0d6f0)

There are now no-longer any unset titles — even if the shell hasn't been
touched.

**As an aside:** I feel quite strongly that (at least OSC 2) shell
integration should be enabled by default, as it is for every other Linux
shell I've used, but I'm not sure which issues that caused that the
default config refers to? Which terminals are broken by shell
integration, and could some of the shell integrations be turned on by
default after splitting things into sub-options as suggested in #11301 ?

# User-Facing Changes

You'll just have shell integrations working from right after the shell
has been launched, instead of needing to run something first.

# Tests + Formatting

Not quite sure how to test this one? Are there any other tests that
currently exist for shell integration? I couldn't quite track them
down...

# After Submitting

Let me know if you think this needs any user-facing docs changes!
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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.