Add tmux and vim configuration files

- Introduced a comprehensive tmux configuration file with custom themes, key bindings, and session management options.
- Added a lightweight vim configuration file utilizing vim-plug for plugin management, including themes, fuzzy finder, file tree, and editing helpers.

vim/.vimrc

@@ -0,0 +1,132 @@
+" Ada's Vim config — lightweight and close to Neovim setup
+" Encoding and basics
+scriptencoding utf-8
+set nocompatible
+
+" Leader
+let mapleader = " "
+
+" UI
+set number
+set relativenumber
+set cursorline
+set signcolumn=yes
+set termguicolors
+
+" Indentation
+set expandtab
+set shiftwidth=2
+set tabstop=2
+set smartindent
+
+" Search
+set ignorecase
+set smartcase
+set incsearch
+
+" Files
+set noswapfile
+set undofile
+
+" Performance
+set updatetime=200
+set timeoutlen=400
+
+" Splits
+set splitbelow
+set splitright
+
+" Clipboard (prefer system clipboard if available)
+if has('unnamedplus')
+  set clipboard=unnamedplus
+endif
+
+" Keymaps
+nnoremap <silent> j gj
+nnoremap <silent> k gk
+nnoremap <silent> <leader>w :w<CR>
+nnoremap <silent> <leader>q :q<CR>
+nnoremap <silent> <leader>h :nohlsearch<CR>
+
+" Windows
+nnoremap <silent> <leader>sv <C-w>v
+nnoremap <silent> <leader>sh <C-w>s
+nnoremap <silent> <leader>se <C-w>=
+nnoremap <silent> <leader>sx :close<CR>
+
+" Buffers
+nnoremap <silent> <S-l> :bnext<CR>
+nnoremap <silent> <S-h> :bprevious<CR>
+
+" Quickfix
+nnoremap <silent> ]q :cnext<CR>
+nnoremap <silent> [q :cprev<CR>
+
+" Autocommands
+augroup AdaCore
+  autocmd!
+  " Resize splits equally on terminal resize
+  autocmd VimResized * tabdo wincmd =
+  " Disable auto comment on new line
+  autocmd FileType * setlocal formatoptions-=o formatoptions-=r
+augroup END
+
+" ------------------------------
+" Plugin manager: vim-plug (auto-bootstrap)
+" ------------------------------
+if empty(glob('~/.vim/autoload/plug.vim')) && !exists('$VIM_SKIP_PLUG_BOOTSTRAP')
+  silent !curl -fLo ~/.vim/autoload/plug.vim --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
+  autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
+endif
+
+call plug#begin('~/.vim/plugged')
+
+" Theme (Nord for Vim)
+Plug 'arcticicestudio/nord-vim'
+
+" Fuzzy finder (fzf)
+Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
+Plug 'junegunn/fzf.vim'
+
+" File tree
+Plug 'preservim/nerdtree'
+
+" Editing helpers
+Plug 'tpope/vim-surround'
+Plug 'tpope/vim-commentary'
+
+" Git signs
+Plug 'airblade/vim-gitgutter'
+
+" Statusline
+Plug 'itchyny/lightline.vim'
+
+" Optional: LSP-like features via coc.nvim (uncomment if needed)
+" Plug 'neoclide/coc.nvim', {'branch': 'release'}
+
+call plug#end()
+
+" Colorscheme
+try
+  colorscheme nord
+catch
+  colorscheme default
+endtry
+
+" Lightline theme to match colors
+let g:lightline = { 'colorscheme': 'nord' }
+
+" NERDTree toggle
+nnoremap <silent> <leader>e :NERDTreeToggle<CR>
+
+" FZF mappings
+nnoremap <silent> <leader>ff :Files<CR>
+nnoremap <silent> <leader>fg :Rg<CR>
+nnoremap <silent> <leader>fb :Buffers<CR>
+nnoremap <silent> <leader>fh :Helptags<CR>
+
+" Better terminal colors for fzf in Vim
+let g:fzf_layout = { 'down': '~40%' }
+
+" If coc.nvim is enabled, you may want additional mappings/settings.
+" See vim/vimrc comments or vim/README.md for tips.