Finally modularize neovim configuration

lua/config/autocmds.lua

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+-- Autocmds configuration
+
+-- Disable semantic tokens
+vim.api.nvim_create_autocmd("LspAttach", {
+	callback = function(args)
+		local client = vim.lsp.get_client_by_id(args.data.client_id)
+		client.server_capabilities.semanticTokensProvider = nil
+	end,
+})
+
+-- Go back to last edited line when reopening file
+vim.api.nvim_create_autocmd("BufRead", {
+	callback = function(opts)
+		vim.api.nvim_create_autocmd("BufWinEnter", {
+			once = true,
+			buffer = opts.buf,
+			callback = function()
+				local ft = vim.bo[opts.buf].filetype
+				local last_known_line = vim.api.nvim_buf_get_mark(opts.buf, '"')[1]
+				if
+					not (ft:match("gitcommit") and ft:match("gitrebase"))
+					and last_known_line > 1
+					and last_known_line <= vim.api.nvim_buf_line_count(opts.buf)
+				then
+					vim.api.nvim_feedkeys([[g`"]], "nx", false)
+				end
+			end,
+		})
+	end,
+})
+
+-- Disable semantic highlights
+for _, group in ipairs(vim.fn.getcompletion("@lsp", "highlight")) do
+	vim.api.nvim_set_hl(0, group, {})
+end

lua/config/formatting.lua

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+-- Formatting configuration
+
+-- Set rustfmt command
+vim.g["rustfmt_command"] = "rustfmt +nightly"
+
+-- Commands to disable/enable formatting
+require("conform").setup({
+	format_on_save = function(bufnr)
+		-- Disable with a global or buffer-local variable
+		if vim.g.disable_autoformat or vim.b[bufnr].disable_autoformat then
+			return
+		end
+		return { timeout_ms = 500, lsp_fallback = true }
+	end,
+})
+
+vim.api.nvim_create_user_command("FormatDisable", function(args)
+	if args.bang then
+		-- FormatDisable! will disable formatting just for this buffer
+		vim.b.disable_autoformat = true
+	else
+		vim.g.disable_autoformat = true
+	end
+end, {
+	desc = "Disable autoformat-on-save",
+	bang = true,
+})
+
+vim.api.nvim_create_user_command("FormatEnable", function()
+	vim.b.disable_autoformat = false
+	vim.g.disable_autoformat = false
+end, {
+	desc = "Re-enable autoformat-on-save",
+})

lua/config/keymaps.lua

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+-- Keymaps configuration
+
+-- Clear search highlight
+vim.keymap.set("n", "<Esc>", "<cmd>nohlsearch<CR>")
+
+-- Diagnostic keymaps
+vim.keymap.set("n", "[d", vim.diagnostic.goto_prev, { desc = "Go to previous [D]iagnostic message" })
+vim.keymap.set("n", "]d", vim.diagnostic.goto_next, { desc = "Go to next [D]iagnostic message" })
+vim.keymap.set("n", "<leader>e", vim.diagnostic.open_float, { desc = "Show diagnostic [E]rror messages" })
+vim.keymap.set("n", "<leader>q", vim.diagnostic.setloclist, { desc = "Open diagnostic [Q]uickfix list" })
+
+-- Window navigation
+vim.keymap.set("n", "<C-h>", "<C-w><C-h>", { desc = "Move focus to the left window" })
+vim.keymap.set("n", "<C-l>", "<C-w><C-l>", { desc = "Move focus to the right window" })
+vim.keymap.set("n", "<C-j>", "<C-w><C-j>", { desc = "Move focus to the lower window" })
+vim.keymap.set("n", "<C-k>", "<C-w><C-k>", { desc = "Move focus to the upper window" })
+
+-- LSP keymaps
+vim.keymap.set("n", "gd", vim.lsp.buf.definition, { desc = "Goto Definition" })

lua/config/lazy.lua

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+-- Lazy.nvim plugin manager setup
+
+local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
+if not vim.loop.fs_stat(lazypath) then
+	local lazyrepo = "https://github.com/folke/lazy.nvim.git"
+	vim.fn.system({ "git", "clone", "--filter=blob:none", "--branch=stable", lazyrepo, lazypath })
+end
+vim.opt.rtp:prepend(lazypath)
+
+-- User dictionary for spell checking
+local path = vim.fn.stdpath("config") .. "/spell/en.utf-8.add"
+local words = {}
+
+for word in io.open(path, "r"):lines() do
+	table.insert(words, word)
+end

lua/config/options.lua

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+-- Options configuration
+vim.g.mapleader = ";"
+vim.g.maplocalleader = ";"
+
+-- Line numbers
+vim.opt.number = true
+vim.opt.relativenumber = true
+
+-- Mouse
+vim.opt.mouse = ""
+
+-- Mode display
+vim.opt.showmode = false
+
+-- Search
+vim.opt.ignorecase = true
+vim.opt.smartcase = true
+vim.opt.hlsearch = true
+
+-- Sign column
+vim.opt.signcolumn = "yes"
+
+-- Splits
+vim.opt.splitright = true
+vim.opt.splitbelow = true
+
+-- Whitespace display
+vim.opt.list = true
+vim.opt.listchars = { tab = "» ", trail = "·", nbsp = "␣" }
+
+-- Live substitution preview
+vim.opt.inccommand = "split"
+
+-- Cursor line
+vim.opt.cursorline = true
+
+-- General settings
+vim.opt.shiftwidth = 4
+vim.opt.tabstop = 4
+vim.opt.expandtab = true
+vim.opt.tw = 100
+vim.opt.colorcolumn = "+1"
+vim.opt.termguicolors = true
+vim.opt.pumheight = 5
+
+-- Light mode check
+local function file_exists(name)
+	local f = io.open(name, "r")
+	return f ~= nil and io.close(f)
+end
+
+local home = os.getenv("HOME")
+if file_exists(home .. "/.config/nvim/light_mode") then
+	vim.opt.background = "light"
+end