Fix Python-packages toolbar icon: add deployed_code to unfilled font subset

The file-tree "Python packages" button rendered the literal text
"deployed_code" in the icon font because that glyph was missing from the
outlined/unfilled Material Symbols subset (MaterialSymbolsRoundedUnfilledPartialSlice.woff2),
so the ligature never resolved. The toolbar buttons all use the unfilled
variant, so switching this one to the full filled font would look inconsistent.

Add 'deployed_code' to unfilled-symbols.mjs and regenerate the subset woff2
(same Google Fonts request build-unfilled.mjs makes) so the box/package icon
renders, matching the other outlined toolbar icons.

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

services/web/frontend/fonts/material-symbols/unfilled-symbols.mjs

@@ -24,6 +24,7 @@ export default /** @type {const} */ ([
   'create_new_folder',
   'delete_forever',
   'delete',
+  'deployed_code',
   'description',
   'domain',
   'edit',