Neovim migration — Phase 5: File navigation and search (telescope, oil/nvim-tree, ripgrep)

[mattmenefee]

Blocked by

• Neovim migration — Phase 3: Replace Vundle with lazy.nvim #69

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Replace NERDTree, ag.vim, and vim-ags with modern Neovim equivalents.

Depends on: Phase 3 (lazy.nvim required).

Changes

• Replace scrooloose/nerdtree with either nvim-tree/nvim-tree.lua or stevearc/oil.nvim (oil.nvim is the modern choice — edits the filesystem as a buffer)
• Replace rking/ag.vim and gabesoft/vim-ags with nvim-telescope/telescope.nvim (live grep, file picker, buffer list, LSP pickers)
• Swap the_silver_searcher → ripgrep in Brewfile (telescope and most modern tooling expect rg)
• Update mappings:
  • <Leader>s → telescope grep on word under cursor
  • <Leader>a → telescope grep
  • <Leader><Leader>a → close telescope
  • Add a file-picker keymap (commonly <C-p>)
• Replace these config bits with nvim-tree/oil equivalents:
  • let g:NERDTreeHijackNetrw=1
  • let NERDTreeShowHidden=1
  • The autocmd VimEnter * if argc() == 0 ... | NERDTree | endif startup autocmd

Acceptance

• <Leader>s on a word opens telescope grep results
• File picker opens via shortcut
• Tree explorer of choice opens on startup with no args
• ag removed from Brewfile, ripgrep added