feat: add fixjson (#126)

Co-authored-by: Magnus Larsen <[email protected]>

README.md

@@ -191,6 +191,7 @@ You can view this list in vim with `:help conform-formatters`
 - [erb_format](https://github.com/nebulab/erb-formatter) - Format ERB files with speed and precision.
 - [eslint_d](https://github.com/mantoni/eslint_d.js/) - Like ESLint, but faster.
 - [fish_indent](https://fishshell.com/docs/current/cmds/fish_indent.html) - Indent or otherwise prettify a piece of fish code.
+- [fixjson](https://github.com/rhysd/fixjson) - JSON Fixer for Humans using (relaxed) JSON5.
 - [gci](https://github.com/daixiang0/gci) - GCI, a tool that controls Go package import order and makes it always deterministic.
 - [gdformat](https://github.com/Scony/godot-gdscript-toolkit) - A formatter for Godot's gdscript.
 - [gofmt](https://pkg.go.dev/cmd/gofmt) - Formats go programs.

doc/conform.txt

@@ -189,6 +189,7 @@ FORMATTERS                                                    *conform-formatter
 `erb_format` - Format ERB files with speed and precision.
 `eslint_d` - Like ESLint, but faster.
 `fish_indent` - Indent or otherwise prettify a piece of fish code.
+`fixjson` - JSON Fixer for Humans using (relaxed) JSON5.
 `gci` - GCI, a tool that controls Go package import order and makes it always
       deterministic.
 `gdformat` - A formatter for Godot's gdscript.

lua/conform/formatters/fixjson.lua

@@ -0,0 +1,8 @@
+---@type conform.FileFormatterConfig
+return {
+  meta = {
+    url = "https://github.com/rhysd/fixjson",
+    description = "JSON Fixer for Humans using (relaxed) JSON5 ",
+  },
+  command = "fixjson",
+}