refactor: restructure init.lua to use lazy plugin manager and add lsp configurations

lua/plugins/colorscheme.lua

@@ -0,0 +1,39 @@
+return {
+	"ellisonleao/gruvbox.nvim",
+	priority = 1000,
+	config = function()
+		local palette = require("gruvbox").palette
+		require("gruvbox").setup({
+			bold = false,
+			italic = {
+				strings = false,
+				emphasis = false,
+				comments = false,
+				folds = false,
+			},
+			contrast = "hard",
+			transparent_mode = true,
+			overrides = {
+				-- builtin
+				SignColumn = { bg = "None" },
+				CursorLineNr = { bg = "None" },
+				Whitespace = { fg = palette.dark0 },
+				EndOfBuffer = { fg = palette.dark0_hard },
+				Visual = { fg = "None", bg = palette.dark1 },
+				Label = { link = "GruvboxPurple" },
+
+				-- blink.cmp
+				BlinkCmpMenu = { link = "Normal" },
+				BlinkCmpMenuBorder = { link = "BlinkCmpMenu" },
+				BlinkCmpMenuSelection = { fg = "None", bg = palette.dark1 },
+				BlinkCmpLabelMatch = { fg = palette.bright_green },
+				BlinkCmpScrollBarGutter = { bg = palette.dark2 },
+				BlinkCmpScrollBarThumb = { bg = palette.light1 },
+
+				-- indent guides
+				MiniIndentscopeSymbol = { fg = palette.dark1 },
+			},
+		})
+		vim.cmd.colorscheme("gruvbox")
+	end,
+}