[EibrielInv]

What

Completes the custom fonts (fontSrc) docs for #238, on top of #239.

main said the mobile app ignores fontSrc and that font family names aren't supported anywhere. Mobile now supports custom fonts (decentraland/godot-explorer#3132, which closed godot-explorer#3092), and both mobile and Bevy resolve Google Fonts family names.

Closes #238

Changes

• creator/sdk7/3d-essentials/text.md → Custom fonts:
  • fontSrc takes a scene .ttf path or a Google Fonts family name; new 'Playfair Display' example.
  • Support table: Desktop / Mobile / Bevy web × scene .ttf / family name. All three apply fontSrc to TextShape and UI Label, Button, Input, Dropdown.
  • Bullets: no external URLs; Google Fonts family names (name format, case-insensitive, Fontsource, 400/700 weight choice, Latin only, desktop shows the fallback); mobile caveats (16 custom font loads per scene, UI + 3D count separately; no simulated bold on 3D text; new characters can take a moment); .ttf detected from file contents; 16 MB on desktop and mobile.
• creator/sdk7/2d-ui/ui_text.md → Custom fonts: same in short form, Label example with a family name, mobile bullet replaced.
• creator/sdk7/2d-ui/ui_special_types.md: fontSrc description mentions family names.
• creator/build-for-mobile/mobile-client/missing-features.md: removed the custom fonts row.

Not touched: the Fonts intro in text.md (#246 rewrites it). The fontSrc property line sits next to #246's fontSize fix, so a small conflict is possible.

Source of truth

Read from code:

	Desktop (unity-explorer dev)	Mobile (godot-explorer main)	Bevy (main)
Scene .ttf	after asset-bundle conversion	yes	yes
Family name	no	Fontsource	Fontsource
External URL	rejected	rejected	accepted (not documented)
Limits	16 MB	16 MB, 16 font loads per scene	none found

• Mobile: lib/crates/dcl_engine/src/content/font.rs.
• Desktop: StreamableLoading/Fonts/FontSrcResolver.cs, LoadFontSystem.cs.
• Bevy: crates/scene_runner/src/update_world/fonts.rs.

For reviewers

• Mobile support is merged in godot-explorer but not yet in the store build (v1.16.1). It's documented as available now on purpose. It will be in the next mobile release.
• Spanish (creator-esp) has no custom fonts content yet. That's a separate follow-up.

Checks

npm test, check:links, check:anchors and check:navigation pass. The new examples type-check against @dcl/sdk@7.33.0.