readme(transparent): Add custom_highlights direction (#201)

fix(transparent): Add FAQ

README.md

@@ -458,11 +458,30 @@ vim.api.nvim_create_autocmd("User", {
 
 ## FAQ
 
-#### [Abnormal colors](https://github.com/catppuccin/nvim/issues/182)?
+#### Transparenct background tweak?
+
+Add this to `custom_highlights` settings
+
+```lua
+custom_highlights = {
+	Comment = { fg = colors.overlay1 },
+	LineNr = { fg = colors.overlay1 },
+	CursorLine = { bg = colors.none },
+	CursorLineNr = { fg = colors.lavender },
+	DiagnosticVirtualTextError = { bg = colors.none },
+	DiagnosticVirtualTextWarn = { bg = colors.none },
+	DiagnosticVirtualTextInfo = { bg = colors.none },
+	DiagnosticVirtualTextHint = { bg = colors.none },
+},
+```
+
+#### Abnormal colors?
 
 You need to enable [truecolor](https://wiki.archlinux.org/title/Color_output_in_console#True_color_support)
 
-#### Toggle light/dark theme based on background value?
+Related: [:h termguicolors](https://neovim.io/doc/user/options.html#'termguicolors'), [catppuccin/nvim#182](https://github.com/catppuccin/nvim/issues/182),
+
+#### Use catppuccin theme for :set background=light/dark?
 
 The following autocmd will change the flavour to latte when you `:set background=light` and to mocha after `:set background=dark`
 

lua/catppuccin/groups/integrations/lsp_saga.lua

@@ -24,4 +24,5 @@ function M.get()
 		TargetWord = { fg = cp.flamingo },
 	}
 end
+
 return M

lua/catppuccin/lib/compiler.lua

@@ -42,9 +42,7 @@ vim.g.colors_name = "catppuccin"]],
 			table.insert(lines, fmt("vim.o.%s = %s", property, inspect(value)))
 		end
 	end
-	local tbl = vim.tbl_deep_extend("keep", theme.integrations, theme.editor)
-	tbl = vim.tbl_deep_extend("keep", theme.syntax, tbl)
-	tbl = vim.tbl_deep_extend("keep", config.custom_highlights, tbl)
+	local tbl = vim.tbl_deep_extend("keep", config.custom_highlights, theme.integrations, theme.syntax, theme.editor)
 
 	for group, color in pairs(tbl) do
 		if color.link then

lua/catppuccin/lib/highlighter.lua

@@ -38,10 +38,15 @@ function M.load(theme)
 	g.colors_name = "catppuccin"
 
 	M.properties(theme.properties, "o")
-	M.syntax(theme.editor)
-	M.syntax(theme.syntax)
-	M.syntax(theme.integrations)
-	M.syntax(require("catppuccin.config").options.custom_highlights)
+	M.syntax(
+		vim.tbl_deep_extend(
+			"keep",
+			require("catppuccin.config").options.custom_highlights,
+			theme.integrations,
+			theme.syntax,
+			theme.editor
+		)
+	)
 
 	if require("catppuccin.config").options["term_colors"] then
 		M.properties(theme.terminal, "g")