Join: merge origin/main (#610, the knowledge base's close verb)

Conflicts in mesh-knowledge: main.go Verbs and manifest_test.go, A6's draft verbs and
#610's close, both kept in the manifest's order; review.go reviewOne, A6 judges a version
in parts and #610 judges a closing on its closing alone: a closing version is one part
(ClosingPart) asked ClosingQuestion. Joined: close.go's asks import by the rewrite map,
and its rules probe names its overview section "Overview", since A6's section-form rule
refuses a file-named section (close's test failed on it).

Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig

modules/mesh-knowledge/module.json

@@ -129,6 +129,7 @@
         "import",
         "return",
         "withdraw",
+        "close",
         "retract",
         "progress"
       ]
@@ -158,6 +159,7 @@
         "import",
         "return",
         "withdraw",
+        "close",
         "retract",
         "progress"
       ]