Remove legacy dev config and consolidate to Eglot-based setup

- Delete emacs-dev-config.el (650 lines of legacy lsp-mode config)
- Update emacs-dev-config-modern.el to use Company instead of Corfu
- Remove legacy config loading from init.el and init-utils.el
- Update CLAUDE.md documentation to reflect new architecture

New structure:
- init-eglot.el: LSP support (auto-enables for programming modes)
- emacs-dev-config-modern.el: Optional extras via M-x enable-dev-mode-modern
- init-completion.el: Company completion (single source of truth)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -68,10 +68,9 @@ M-x disable-eslint-in-buffer  ; Disable ESLint in current buffer
 - `init-editor.el` - Selection keybindings, shift-selection fixes
 
 **Development:**
-- `init-eglot.el` - Built-in LSP client configuration
+- `init-eglot.el` - Built-in LSP client configuration (auto-enables for programming modes)
 - `init-treesitter.el` - Tree-sitter support for Emacs 29+
-- `emacs-dev-config-modern.el` - Modern development setup with Eglot
-- `emacs-dev-config.el` - Legacy LSP-mode configuration
+- `emacs-dev-config-modern.el` - Additional dev tools (yasnippet, origami, etc.) via `M-x enable-dev-mode-modern`
 
 **Fix Modules:**
 - `init-emergency-fix.el` - Emergency editing restoration