web: vendor webmidi locally to fix editor/run page hang (amyboard + tulip web) (#1064)

* amyboardweb: vendor webmidi locally to fix editor page hang

The editor loaded webmidi.js as a render-blocking <script src> pointing at
cdn.jsdelivr.net/npm/webmidi@latest. When jsdelivr's @latest/ranged version
resolution for that package stalls, the synchronous script blocks the browser
from rendering the rest of /editor/, so the page hangs (the marketing site is
unaffected because it doesn't load webmidi).

Self-host webmidi v3.1.16 (the version @latest currently resolves to) under
static/vendor/, matching the existing vendor/qwerty-hancock.min.js pattern, and
reference the local copy. This removes the third-party render-blocking
dependency and pins the version so a future @latest change can't stall or break
the editor.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* tulip/web: vendor webmidi locally too (same editor-hang fix)

Tulip Web's /run/ page had the same render-blocking
cdn.jsdelivr.net/npm/webmidi@latest <script> that hangs the page when
jsdelivr's @latest resolution stalls. Self-host webmidi v3.1.16 alongside the
other flat static JS (tree.js, spss.js, mini-coi.js) — build.sh's `cp static/*`
is non-recursive, so it goes in static/ root rather than a vendor/ subdir — and
reference it via the same-origin <base href="/run/">.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: bwhitman

tulip/amyboardweb/static/editor/index.html

@@ -53,7 +53,7 @@
     <script src="editor_knobs.js"></script>
     <script src="./mini-coi.js" scope="./"></script>
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>
-    <script src="https://cdn.jsdelivr.net/npm/webmidi@latest/dist/iife/webmidi.iife.js"></script>
+    <script src="vendor/webmidi.iife.js"></script>
     <script src="vendor/qwerty-hancock.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/6.65.7/codemirror.min.js" crossorigin="anonymous" referrerpolicy="no-referrer"></script> 
     <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/6.65.7/mode/python/python.min.js" crossorigin="anonymous" referrerpolicy="no-referrer"></script>