frames: rebrand the fork to Hanzo Frames

Forked from HyperFrames (Apache-2.0), full history preserved.

Hosts are mapped explicitly and BEFORE the identifier rename, because
hyperframes.heygen.com is not decoration: 175 of its occurrences are $schema
identifiers that a validator dereferences. A blind rename would have left them
naming a host that never serves them. The schema files are in this repo under
docs/schema, so the mapped host is one we can actually serve -- that is the
condition that makes the rewrite safe, and serving them is a deploy task, not
an edit. docs/schema/hyperframes.json is renamed to frames.json to match the
identifier it is now published under.

api.heygen.com and the CLI auth against heygen.com are left UNRENAMED on
purpose. They are a dependency on HeyGen's SaaS, not a name of ours to take,
and the right move is to remove that integration rather than rebrand it.

LICENSE and CREDITS.md are untouched; NOTICE records the lineage.

Co-authored-by: Hanzo Dev <[email protected]>

registry/blocks/code-diff/code-diff.html

@@ -598,10 +598,10 @@
       window.__BLOCK = { id: "code-diff", effect: "diff", seq: "diff", duration: 6 };
     </script>
     <script>
-      // hf-code-anim.js — self-contained code-animation engine for HyperFrames registry blocks.
+      // hf-code-anim.js — self-contained code-animation engine for Frames registry blocks.
       //
       // Reuses Shiki Magic Move's baked output (window.__TOKENS, baked at author time) and
-      // drives the animation as a PAUSED GSAP timeline the HyperFrames engine seeks per frame —
+      // drives the animation as a PAUSED GSAP timeline the Frames engine seeks per frame —
       // NOT CSS transitions (those break under non-sequential frame seeking). FLIP measurement
       // runs once inside document.fonts.ready (glyph metrics must be final). Each block sets
       // window.__BLOCK = { id, effect, seq, line?, duration } and includes this engine; the