Add transparency support

Changes to be committed:
      modified:   init.lua
      modified:   lua/plugins.lua
      new file:   lua/transparency.lua

lua/plugins.lua

@@ -4,6 +4,9 @@ if not ok then
 end
 
 packer.startup(function(use)
+	-- Transparency
+	use("xiyaowong/nvim-transparent")
+
 	-- Base16 colorscheme
 	use("RRethy/nvim-base16")
 

lua/transparency.lua

@@ -0,0 +1,20 @@
+local ok, transparent = pcall(require, "transparent")
+if not ok then
+	return
+end
+
+transparent.setup({
+	enable = false, -- boolean: enable transparent
+	extra_groups = { -- table/string: additional groups that should be cleared
+		-- In particular, when you set it to 'all', that means all available groups
+		-- example of akinsho/nvim-bufferline.lua
+		"BufferLineTabClose",
+		"BufferlineBufferSelected",
+		"BufferLineFill",
+		"BufferLineBackground",
+		"BufferLineSeparator",
+		"BufferLineIndicatorSelected",
+	},
+	exclude = {}, -- table: groups you don't want to clear
+	ignore_linked_group = true, -- boolean: don't clear a group that links to another group
+})