update docs with syntax extras

Author: willmcgugan

docs/examples/widgets/text_area_custom_language.py

@@ -22,7 +22,7 @@ def compose(self) -> ComposeResult:
         text_area.cursor_blink = False
 
         # Register the Java language and highlight query
-        text_area.register_language(java_language, java_highlight_query)
+        text_area.register_language("java", java_language, java_highlight_query)
 
         # Switch to Java
         text_area.language = "java"

docs/getting_started.md

@@ -1,23 +1,25 @@
+
 All you need to get started building Textual apps.
 
 ## Requirements
 
 Textual requires Python 3.8 or later (if you have a choice, pick the most recent Python). Textual runs on Linux, macOS, Windows and probably any OS where Python also runs.
 
-!!! info inline end "Your platform"
+!!! info "Your platform"
 
     ### :fontawesome-brands-linux: Linux (all distros)
 
     All Linux distros come with a terminal emulator that can run Textual apps.
 
     ### :material-apple: macOS
 
-    The default terminal app is limited to 256 colors. We recommend installing a newer terminal such as [iterm2](https://iterm2.com/), [Kitty](https://sw.kovidgoyal.net/kitty/), or [WezTerm](https://wezfurlong.org/wezterm/).
+    The default terminal app is limited to 256 colors. We recommend installing a newer terminal such as [iterm2](https://iterm2.com/), [Ghostty](https://ghostty.org/), [Kitty](https://sw.kovidgoyal.net/kitty/), or [WezTerm](https://wezfurlong.org/wezterm/).
 
     ### :material-microsoft-windows: Windows
 
     The new [Windows Terminal](https://apps.microsoft.com/store/detail/windows-terminal/9N0DX20HK701?hl=en-gb&gl=GB) runs Textual apps beautifully.
 
+
 ## Installation
 
 Here's how to install Textual.
@@ -36,6 +38,12 @@ If you plan on developing Textual apps, you should also install textual develope
 pip install textual-dev
 ```
 
+If you would like to enable syntax highlighting in the [TextArea](./widgets/text_area.md) widget, you should specify the "syntax" extras when you install Textual:
+
+```
+pip install "textual[syntax]"
+```
+
 ### From conda-forge
 
 Textual is also available on [conda-forge](https://conda-forge.org/). The preferred package manager for conda-forge is currently [micromamba](https://mamba.readthedocs.io/en/latest/installation/micromamba-installation.html):