feat(web): update landing page copy for full feature surface, add getting started + mesh vs MCP

Landing page copy was stuck at the v0.1 feature set (messaging + state + memory + groups).
The CLI now ships 43 MCP tools across 5 persistence backends. This commit brings the site
copy in sync with what's actually built.

Changes:
- Hero, features, pricing, FAQ, CTA, footer: reflect 43 tools, files, SQL, vectors, graphs
- Features section: expanded from 4 tabs to 7 (added Files, Database, Vectors)
- New /getting-started page: full install guide with correct 4-step flow
- New Mesh vs MCP section: side-by-side diagrams + 8-row comparison table
- Fix: install-toggle on /join page had `npx claudemesh@latest init` (init doesn't exist)
  → replaced with `curl -fsSL https://claudemesh.com/install | bash`
- Navigation: added Getting Started to header, footer, hero link
- COPY.md synced with all 6 capability areas

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/src/app/[locale]/(marketing)/page.tsx

@@ -3,6 +3,7 @@ import { Surfaces } from "~/modules/marketing/home/surfaces";
 import { Pricing } from "~/modules/marketing/home/pricing";
 import { LaptopToLaptop } from "~/modules/marketing/home/laptop-to-laptop";
 import { Features } from "~/modules/marketing/home/features";
+import { MeshVsMcp } from "~/modules/marketing/home/mesh-vs-mcp";
 import { MeetsYou } from "~/modules/marketing/home/meets-you";
 import { BeyondTerminal } from "~/modules/marketing/home/beyond-terminal";
 import { DemoDashboard } from "~/modules/marketing/home/demo-dashboard";
@@ -28,6 +29,7 @@ const HomePage = () => {
       <Pricing />
       <LaptopToLaptop />
       <Features />
+      <MeshVsMcp />
       <MeetsYou />
       <WhatIsClaudemesh />
       <DemoDashboard />