Add comprehensive Neovim configuration with lazy.nvim and essential plugins

[edge2992]

Summary

• Complete Neovim configuration setup with lazy.nvim plugin manager
• Added essential plugins: neo-tree, lualine, autopairs, copilot, vim-commentary
• Updated README with detailed Neovim configuration documentation
• Refactored installation scripts for better organization
• Fixed settings.json syntax error

Changes Made

• Neovim Configuration:

  • Migrated from basic setup to full Lua-based configuration
  • Implemented lazy.nvim for efficient plugin management
  • Added core plugins for file management, statusline, and code editing
  • Configured window management keymaps and essential options

• Documentation:

  • Updated README with comprehensive Neovim section
  • Added plugin descriptions and configuration structure
  • Documented key features and lazy loading benefits

• Installation Scripts:

  • Split package installation into focused scripts
  • Added chezmoi external management for tpm and lazy.nvim
  • Improved Rust, Python, and Node.js tool installation

Test Plan

• Verify Neovim configuration loads without errors
• Test all plugins are properly configured
• Confirm keymaps work as expected
• Validate README accuracy and formatting

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