doc: include delnetworkevent in generated documentation, and grpc.

Also added missing "added" annotation.  This meant that I had to manually
change contrib/msggen/msggen/patch.py to insert that added notation where it
was missing from .msggen.json.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-None: introduced this release.

doc/Makefile

@@ -47,6 +47,7 @@ MARKDOWNPAGES := doc/addgossip.7 \
 	doc/deldatastore.7 \
 	doc/delforward.7 \
 	doc/delinvoice.7 \
+	doc/delnetworkevent.7 \
 	doc/delpay.7 \
 	doc/deprecations.7 \
 	doc/dev-forget-channel.7 \

doc/index.rst

@@ -55,6 +55,7 @@ Core Lightning Documentation
    deldatastore <deldatastore.7.md>
    delforward <delforward.7.md>
    delinvoice <delinvoice.7.md>
+   delnetworkevent <delnetworkevent.7.md>
    delpay <delpay.7.md>
    deprecations <deprecations.7.md>
    dev-forget-channel <dev-forget-channel.7.md>

doc/schemas/delnetworkevent.json

@@ -3,6 +3,7 @@
   "type": "object",
   "rpc": "delnetworkevent",
   "title": "Command for removing a listnetworkevents entry",
+  "added": "v25.12",
   "description": [
     "The **delnetworkevent** RPC command removes a single event from **listnetworkevents**, using the uniquely-identifying *created_index*.",
     "",