fix(wezterm): Add description to harfbuzz_features.

Signed-off-by: Guennadi Maximov C <g.maxc.fox@protonmail.com>

Author: DrKJeff16

lua/wezterm/types/wezterm.lua

@@ -413,6 +413,16 @@
 ---
 ---@class FontFamilyAttributes: FontAttributes
 ---@field family string
+---When [`config.font_shaper`](lua://Config.font_shaper)
+---is set to `"Harfbuzz"`, this setting affects how font shaping takes place.
+---
+---See [Font Shaping](https://wezterm.org/config/font-shaping.html)
+---for more information and examples.
+---
+---The _OpenType_ spec lists a number of features [here](https://docs.microsoft.com/en-us/typography/opentype/spec/featurelist).
+---
+---See [Font Shaping](https://wezterm.org/config/font-shaping.html) for more information and examples.
+---
 ---@field harfbuzz_features? HarfbuzzFeatures[]
 ---@field freetype_load_target? "Normal"|"HorizontalLcd"|"Light"|"Mono"|"VerticalLcd"
 ---@field freetype_render_target? "Normal"|"HorizontalLcd"|"Light"|"Mono"|"VerticalLcd"