netcheck: one module, a Go tools bundle and a TypeScript one (hq ADR 0188, 0193)

ADR 0193 says the node's runtime launches every served bundle over MCP stdio and knows no
language, and ADR 0188 says one module may carry several bundles in any language. Nothing in
the catalogue shows both at once: every tools bundle is TypeScript, and the only Go bundle is
the runtime itself. netcheck is the smallest real module that does — read-only checks from a
machine, worth having on their own:

- tools-go (Go SDK go/v0.1.6): netcheck_tcp (one connect, nothing sent) and netcheck_dns
  (A/AAAA/CNAME/TXT/MX through the machine's resolver).
- tools-typescript (@novox/mesh-sdk): netcheck_http (HEAD or GET, body neither sent nor read,
  redirects reported not followed, anything but http(s) refused).

Both say loads; the module lists its tools. No container, no image, no env: nothing to be
given, so the runtime's own words suffice.

modules/netcheck/module.json

@@ -0,0 +1,35 @@
+{
+  "module": "netcheck",
+  "version": "1",
+  "tools": [
+    "netcheck_tcp",
+    "netcheck_dns",
+    "netcheck_http"
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "tools-go",
+        "kind": "bundle",
+        "language": "go",
+        "system": "arch",
+        "from": "cmd/netcheck",
+        "binary": "netcheck",
+        "loads": [
+          "netcheck"
+        ]
+      },
+      {
+        "name": "tools-typescript",
+        "kind": "bundle",
+        "language": "typescript",
+        "entrypoints": [
+          "tools/index.js"
+        ],
+        "loads": [
+          "tools/index.js"
+        ]
+      }
+    ]
+  }
+}