feat(navigation): customizable route transitions + release 7.0.3

[jacobaraujo7]

Release 7.0.3

Bumps flutter_modular → 7.0.3 and ships the route transitions feature.
Both flutter_modular 7.0.3 and flutter_modular_docs_mcp 0.2.3 have already
been published to pub.dev.

Customizable route transitions

• route(transition:) and the new app-wide ModularApp(defaultTransition:) now
  accept any PageTransition — an open contract that builds the route's Page.
• Three ways to supply one:
  • the TransitionType presets (material, fade, none) — each value now
    is a PageTransition, so existing transition: TransitionType.fade keeps working;
  • CustomTransition — inline convenience: pass a transitionsBuilder (same
    signature as PageRouteBuilder) and optionally tune
    duration/reverseDuration/opaque/barrierColor/barrierDismissible/fullscreenDialog;
  • implement PageTransition yourself for full control of the Page
    (e.g. CupertinoPage swipe-back, fullscreenDialog, shared-axis).
• App-wide default: ModularApp.defaultTransition (default material) applies to
  every route that doesn't declare its own. Precedence: route-local → app default → material.
  route(transition:) now defaults to null (inherit) instead of forcing material.

Docs MCP — 0.2.3

• Re-embeds the reworked navigation page documenting the Transitions section above.

Verification

• flutter analyze: clean · flutter test: 61 passing
• MCP dart analyze: clean · dart test: 12 passing
• Both packages published (pub.dev) and the local MCP binary recompiled.

Commits

• feat(navigation): customizable route transitions with app-wide default
• chore(docs-mcp): release v0.2.3
• chore: release 7.0.3

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