feat(nvim): reorganize and modernize Neovim configuration

- Remove deprecated config files: git-ref.lua, git-signs.lua, diffview-config.lua, lsp-lines-config.lua, neotree-config.lua, fidget-spinner.lua, silicon-config.lua, telescope-config.lua, llm.lua
- Add new configuration files: diagnostics-config.lua, git-config.lua, llm-config.lua, snacks-config.lua
- Update existing config files: base.lua, dap-config.lua, init.lua, lsp-config.lua, lualine-config.lua, noice-config.lua, octo-config.lua, toggleterm-config.lua, which-key-config.lua
- Update nvim and opencode module configurations

homes/aarch64-darwin/evanreichard@mac-va-mbp-work/default.nix

@@ -38,14 +38,8 @@ in
   programs.jq = enabled;
   programs.pandoc = enabled;
   home.packages = with pkgs; [
-    android-tools
-    imagemagick
-    python312
-    texliveSmall # Pandoc PDF Dep
-    google-cloud-sdk
-    tldr
-
-    # AI Assistants
+    colima
+    docker
     reichard.qwen-code
     codex
   ];