feat(nvim): add markdown rendering with `render-markdown.nvim`

See https://github.com/MeanderingProgrammer/render-markdown.nvim

- Don't set `'colorcolumn'` and `'conceallevel'` in markdown ftplugin
- Treesitter plugin doesn't install the markdown and markdown_inline
  parsers. `50-markdown.lua` does it instead, so that it is
  self-contained. It also installs extra parsers it needs: yaml, html
  and latex.
- Remove markdown highlight adjustments in `50-colors.lua`
- Remove `markdown/injections.scm` that was disabling treesitter
  highlighting inside fenced code blocks.

1 files changed, 24 insertions, 0 deletions

diff --git a/.config/nvim/plugin/50-markdown.lua b/.config/nvim/plugin/50-markdown.lua
new file mode 100644
index 0000000..d033d32
--- /dev/null
+++ b/.config/nvim/plugin/50-markdown.lua
@@ -0,0 +1,24 @@
+--
+-- Markdown rendering plugin
+--
+-- Uses `render-markdown`, see https://github.com/MeanderingProgrammer/render-markdown.nvim
+
+vim.pack.add({
+	"https://github.com/nvim-treesitter/nvim-treesitter",
+	"https://github.com/nvim-tree/nvim-web-devicons",
+	"https://github.com/MeanderingProgrammer/render-markdown.nvim",
+})
+
+require("nvim-treesitter").install({
+	"html",
+	"latex",
+	"markdown",
+	"markdown_inline",
+	"yaml",
+})
+
+require("render-markdown").setup({
+	heading = { width = "block", min_width = 120 },
+	code = { position = "center", sign = false, width = "block", min_width = 60, left_margin = 2 },
+	dash = { width = 120 },
+})