add abbreviations

AGENTS.md

@@ -27,17 +27,18 @@ This repository is being migrated to a modern, minimal Neovim setup driven by Lu
     ├── settings.lua          -- non-plugin options
     ├── keymaps.lua           -- non-plugin keymaps
     ├── autocmds.lua          -- non-plugin autocommands
+    ├── abbreviations.lua     -- insert-mode abbreviations
+    ├── netrw-config.lua      -- netrw configuration
     ├── utils.lua             -- helpers (only if needed)
     └── plugins/              -- one file per plugin or domain
-        ├── neo-tree.lua
         ├── telescope.lua
         ├── treesitter.lua
         ├── cmp.lua
         ├── lsp.lua
         ├── copilot.lua
+        ├── oil.lua
         ├── ufo.lua
         ├── gitsigns.lua
-        ├── markdown.lua
         └── none-ls.lua
 ```