Add nftables filetype (#715)

Co-authored-by: Adam Stankiewicz <sheerun@sher.pl>

README.md

@@ -132,6 +132,7 @@ On top of all language packs from [vim repository](https://github.com/vim/vim/tr
 - [meson](https://github.com/mesonbuild/meson/tree/master/data/syntax-highlighting/vim) (Meson syntax highlighting for wrap files)
 - [mint](https://github.com/IrenejMarc/vim-mint) (Syntax highlighting for mint files)
 - [moonscript](https://github.com/leafo/moonscript-vim) (MoonScript syntax highlighting for moon files)
+- [nftables](https://github.com/nfnty/vim-nftables) (Syntax highlighting for nftables config files)
 - [nginx](https://github.com/chr4/nginx.vim) (Nginx syntax highlighting for nginx, nginxconf and vhost files)
 - [nim](https://github.com/zah/nim.vim) (Nim syntax highlighting for nim, nim.cfg, nimble, nimrod and nims files)
 - [nix](https://github.com/LnL7/vim-nix) (Nix syntax highlighting for nix files)

packages.yaml

@@ -5593,6 +5593,16 @@ filetypes:
   - pattern: '*sway/config'
     description: Sway Configuration
 ---
+name: nftables
+remote: nfnty/vim-nftables
+filetypes:
+- name: nftables
+  extensions:
+  - nft
+  patterns:
+  - pattern: '*/nftables.conf'
+    description: nftables configuration
+---
 name: openscad
 remote: sirtaj/vim-openscad
 filetypes:

tests/extensions.vim

@@ -391,6 +391,11 @@ call TestExtension("conf", "auto.master", "")
 " https://github.com/sheerun/vim-polyglot/issues/579
 call TestExtension("dart", "reminders.dart", "")
 
+" nftables
+call TestExtension("nftables", "foo.nft", "")
+call TestExtension("nftables", "nftables.conf", "")
+call TestExtension("nftables", "foo", "#!/usr/bin/env nft")
+
 call TestExtension("racket", "empty.rkt", "")
 
 filetype off