Added ghostty syntax highlighting

.config/nvim/after/ftdetect/ghostty.vim

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+au BufRead,BufNewFile */ghostty/config set ft=ghostty

.config/nvim/after/ftplugin/ghostty.vim

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+" Vim filetype plugin file
+" Language: Ghostty config file
+" Maintainer: Ghostty <https://github.com/ghostty-org/ghostty>
+"
+" THIS FILE IS AUTO-GENERATED
+
+if exists('b:did_ftplugin')
+  finish
+endif
+let b:did_ftplugin = 1
+
+setlocal commentstring=#\ %s
+setlocal iskeyword+=-
+
+" Use syntax keywords for completion
+setlocal omnifunc=syntaxcomplete#Complete
+
+let b:undo_ftplugin = 'setl cms< isk< ofu<'

.config/nvim/after/syntax/ghostty.vim

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+" Vim syntax file
+" Language: Ghostty config file
+" Maintainer: Ghostty <https://github.com/ghostty-org/ghostty>
+"
+" THIS FILE IS AUTO-GENERATED
+
+if exists('b:current_syntax')
+  finish
+endif
+
+let b:current_syntax = 'ghostty'
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+syn keyword ghosttyConfigKeyword
+	\ font-family
+	\ font-family-bold
+	\ font-family-italic
+	\ font-family-bold-italic
+	\ font-style
+	\ font-style-bold
+	\ font-style-italic
+	\ font-style-bold-italic
+	\ font-synthetic-style
+	\ font-feature
+	\ font-size
+	\ font-variation
+	\ font-variation-bold
+	\ font-variation-italic
+	\ font-variation-bold-italic
+	\ font-codepoint-map
+	\ font-thicken
+	\ adjust-cell-width
+	\ adjust-cell-height
+	\ adjust-font-baseline
+	\ adjust-underline-position
+	\ adjust-underline-thickness
+	\ adjust-strikethrough-position
+	\ adjust-strikethrough-thickness
+	\ adjust-cursor-thickness
+	\ grapheme-width-method
+	\ freetype-load-flags
+	\ theme
+	\ background
+	\ foreground
+	\ selection-foreground
+	\ selection-background
+	\ selection-invert-fg-bg
+	\ minimum-contrast
+	\ palette
+	\ cursor-color
+	\ cursor-invert-fg-bg
+	\ cursor-opacity
+	\ cursor-style
+	\ cursor-style-blink
+	\ cursor-text
+	\ cursor-click-to-move
+	\ mouse-hide-while-typing
+	\ mouse-shift-capture
+	\ mouse-scroll-multiplier
+	\ background-opacity
+	\ background-blur-radius
+	\ unfocused-split-opacity
+	\ unfocused-split-fill
+	\ command
+	\ initial-command
+	\ wait-after-command
+	\ abnormal-command-exit-runtime
+	\ scrollback-limit
+	\ link
+	\ link-url
+	\ fullscreen
+	\ title
+	\ class
+	\ x11-instance-name
+	\ working-directory
+	\ keybind
+	\ window-padding-x
+	\ window-padding-y
+	\ window-padding-balance
+	\ window-padding-color
+	\ window-vsync
+	\ window-inherit-working-directory
+	\ window-inherit-font-size
+	\ window-decoration
+	\ window-title-font-family
+	\ window-theme
+	\ window-colorspace
+	\ window-height
+	\ window-width
+	\ window-save-state
+	\ window-step-resize
+	\ window-new-tab-position
+	\ resize-overlay
+	\ resize-overlay-position
+	\ resize-overlay-duration
+	\ focus-follows-mouse
+	\ clipboard-read
+	\ clipboard-write
+	\ clipboard-trim-trailing-spaces
+	\ clipboard-paste-protection
+	\ clipboard-paste-bracketed-safe
+	\ image-storage-limit
+	\ copy-on-select
+	\ click-repeat-interval
+	\ config-file
+	\ config-default-files
+	\ confirm-close-surface
+	\ quit-after-last-window-closed
+	\ quit-after-last-window-closed-delay
+	\ initial-window
+	\ quick-terminal-position
+	\ quick-terminal-screen
+	\ quick-terminal-animation-duration
+	\ shell-integration
+	\ shell-integration-features
+	\ osc-color-report-format
+	\ vt-kam-allowed
+	\ custom-shader
+	\ custom-shader-animation
+	\ macos-non-native-fullscreen
+	\ macos-titlebar-style
+	\ macos-titlebar-proxy-icon
+	\ macos-option-as-alt
+	\ macos-window-shadow
+	\ macos-auto-secure-input
+	\ macos-secure-input-indication
+	\ linux-cgroup
+	\ linux-cgroup-memory-limit
+	\ linux-cgroup-processes-limit
+	\ linux-cgroup-hard-fail
+	\ gtk-single-instance
+	\ gtk-titlebar
+	\ gtk-tabs-location
+	\ adw-toolbar-style
+	\ gtk-wide-tabs
+	\ gtk-adwaita
+	\ desktop-notifications
+	\ bold-is-bright
+	\ term
+	\ enquiry-response
+	\ auto-update
+
+syn match ghosttyConfigComment /^\s*#.*/ contains=@Spell
+
+hi def link ghosttyConfigComment Comment
+hi def link ghosttyConfigKeyword Keyword
+
+let &cpo = s:cpo_save
+unlet s:cpo_save