feat: Sync complete config - Fish, Ghostty, Neovim Scratch

- Add missing Fish configs (direnv, ssh function)
- Add Tokyo Night theme for Ghostty
- Complete Neovim scratch config sync
- Rewrite install.sh for new structure
- Add comprehensive README.md

.config/nvim/lua/core/options.lua

@@ -0,0 +1,61 @@
+-- ============================================================================
+-- Neovim Options - Grundlegende Einstellungen
+-- ============================================================================
+
+local opt = vim.opt
+
+-- Zeilennummern
+opt.number = true
+opt.relativenumber = false -- Absolute Nummern für QA-Arbeit
+
+-- Maus
+opt.mouse = 'a'
+
+-- Clipboard (System Clipboard nutzen)
+opt.clipboard = 'unnamedplus'
+
+-- Tabs & Indentation
+opt.tabstop = 2
+opt.shiftwidth = 2
+opt.expandtab = true
+opt.autoindent = true
+opt.breakindent = true
+
+-- Suche
+opt.ignorecase = true
+opt.smartcase = true
+opt.hlsearch = true
+opt.incsearch = true
+
+-- Aussehen
+opt.termguicolors = true
+opt.signcolumn = 'yes'
+opt.cursorline = true
+opt.scrolloff = 10
+opt.sidescrolloff = 8
+
+-- Split windows
+opt.splitright = true
+opt.splitbelow = true
+
+-- Undo & Backup
+opt.undofile = true
+opt.backup = false
+opt.swapfile = false
+
+-- Performance
+opt.updatetime = 250
+opt.timeoutlen = 300
+
+-- Whitespace characters
+opt.list = true
+opt.listchars = { tab = '» ', trail = '·', nbsp = '␣' }
+
+-- Command line
+opt.showmode = false -- Statusline zeigt mode schon
+
+-- Completion
+opt.completeopt = 'menu,menuone,noselect'
+
+-- Fold (erstmal aus)
+opt.foldenable = false