v0.2.0: broaden tools, ship neovim MCP server, namespace agent

- agents/companion.md: expand tools to full editor + filesystem + web set
  and grant mcp__neovim__* so the agent can drive nvim directly
- skills/*: each skill's allowed-tools also gains mcp__neovim__*
- .mcp.json: ship the mcp-neovim-server config with the plugin so
  installing the plugin auto-wires the editor MCP (uses default socket
  /run/user/1000/nvim.sock — adjust if your uid differs)

.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "nvim-agentic-companion",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "Neovim companion that pairs the running editor (via mcp-neovim-server) with the official Claude Code IDE plugin (coder/claudecode.nvim). Provides an opinionated agent and skills for introspecting your live nvim state (buffers, keymaps, diagnostics, plugins), driving it on your behalf (open files, run keymaps, execute lua), and handing work cleanly to the in-editor Claude Code session for buffer edits.",
   "author": {
     "name": "oleks",