docs(skills): name the media-treatment policy targets instead of alluding to them (#2879)

Two routing surfaces pointed agents at media "policies" and "contracts" without
naming a file. An agent that goes looking and finds nothing fills the gap with
an invented rule.

- skills/hyperframes/SKILL.md: "Load its media-treatment policy" now names
  references/media-treatments.md and states the policy governs how footage is
  treated, never whether media may be used.
- skills/general-video/SKILL.md: "adoption, resolution, provider, provenance,
  and reuse contracts" now names references/resolve.md and
  references/setup-providers.md. Drops "provenance", which is ledger
  bookkeeping in operations.md, not a contract to follow.
- The scaffolded project templates carried the same unnamed pointer and ship to
  every hyperframes init; both updated and kept byte-identical.

skills-manifest.json

@@ -14,11 +14,11 @@
       "files": 2
     },
     "general-video": {
-      "hash": "87f292b572cad3f9",
+      "hash": "49f5216832cb8e91",
       "files": 4
     },
     "hyperframes": {
-      "hash": "02b48855a5321e48",
+      "hash": "db16e302ad866b42",
       "files": 17
     },
     "hyperframes-animation": {