docs(v3.5.0): update README for integrated mg_dotfiles and security improvements

- Integrated mg_dotfiles as regular directory (not submodule)
- Added .zshrc.local.example template for local configs without secrets
- Added mg_dotfiles/zsh/.zshrc.local to .gitignore to protect API keys
- Updated README to reflect mg_dotfiles integration and new structure
- Added nvim configuration directory with LazyVim setup

mg_dotfiles/nvim/lua/plugins/codecompanion/codecompanion-notifier.lua

@@ -0,0 +1,119 @@
+local M = {}
+
+local uv = vim.uv
+local api = vim.api
+
+local active = {} -- dictionary of active requests
+
+local S = {
+  frames = { "⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏" },
+  speed = 80, -- milliseconds per frame
+}
+
+local function spinner_frame()
+  local time = math.floor(uv.hrtime() / (1e6 * S.speed))
+  local idx = time % #S.frames + 1
+  local frame = S.frames[idx]
+
+  return frame
+end
+
+local function refresh_notifications(key)
+  return function()
+    local req = active[key]
+    if not req then
+      return
+    end
+
+    vim.notify(req.msg, vim.log.levels.INFO, {
+      id = "cc_progress",
+      title = req.adapter,
+      opts = function(notif)
+        local icon = " "
+        if not req.done then
+          icon = spinner_frame()
+        end
+
+        notif.icon = icon
+      end,
+    })
+  end
+end
+
+local function request_key(data)
+  local adapter = data.adapter or {}
+  local name = adapter.formatted_name or adapter.name or "unknown"
+  return string.format("%s:%s", name, data.id or "???")
+end
+
+local function start(ev)
+  local data = ev.data or {}
+  local key = request_key(data)
+  local adapter = data.adapter and data.adapter.name or "CodeCompanion"
+  local refresh = refresh_notifications(key)
+
+  local timer = uv.new_timer()
+  local req = {
+    adapter = adapter,
+    done = false,
+    msg = "Thinking...",
+    refresh = refresh,
+    timer = timer,
+  }
+
+  active[key] = req
+
+  timer:start(0, 150, vim.schedule_wrap(refresh))
+  refresh()
+end
+
+local function finished(ev)
+  local data = ev.data or {}
+  local key = request_key(data)
+  local req = active[key]
+
+  if not req then
+    return
+  end
+
+  req.done = true
+
+  if data.status == "success" then
+    req.msg = "Done."
+  elseif data.status == "error" then
+    req.msg = "Error!"
+  else
+    req.msg = "Cancelled."
+  end
+
+  req.refresh()
+
+  -- clear the finished request
+  active[key] = nil
+  if req.timer then
+    req.timer:stop()
+    req.timer:close()
+  end
+end
+
+function M.setup()
+  local group = vim.api.nvim_create_augroup("CodeCompanionSnacks", { clear = true })
+
+  vim.api.nvim_create_autocmd("User", {
+    pattern = "CodeCompanionRequestStarted",
+    group = group,
+    callback = start,
+  })
+
+  vim.api.nvim_create_autocmd("User", {
+    pattern = "CodeCompanionRequestFinished",
+    group = group,
+    callback = finished,
+  })
+end
+
+function M.init()
+  M.setup()
+end
+
+return M