fix(expo-template): align dependencies with Expo SDK 54

[oleksandrzavarzin-callstack]

PR Description

Bug fix for @bottom-tabs/expo-template. A freshly scaffolded app didn't typecheck and had
dependency drift.

• Dependency drift. expo install --check reported react-native-reanimated@~4.3.1
  (expected ~4.1.1), react-native-worklets@~0.8.3 (expected 0.5.1) and
  @react-navigation/native@^7.2.2 (expected ^7.1.8).
  This is the same class of breakage fixed in v1.1.2, so it regressed.

• Two type errors, both in template files. ExternalLink's href was typed string while
  app.json sets experiments.typedRoutes: true; it needs Href, intersected with string so
  openBrowserAsync(href) still typechecks. IconSymbol's style was ViewStyle but is
  forwarded to MaterialIcons, which is Text-based.

• Four unused dependencies removed: expo-build-properties (a leftover from the
  useFrameworks: "static" config dropped in feat: drop SDWebImage, implement svg decoder #427),
  react-native-webview, and expo-blur + expo-haptics (leftovers from the stock
  Expo template).

yarn.lock is updated, since CI installs with --immutable.

How to test?

Pack the template from this branch and scaffold from the tarball:

yarn workspace @bottom-tabs/expo-template pack --out /tmp/expo-template.tgz
npx create-expo-app@latest /tmp/tpl --template /tmp/expo-template.tgz
cd /tmp/tpl && npm install
npx expo start   # once, then stop it - this generates .expo/types/router.d.ts

• npx expo install --check → Dependencies are up to date
• npx tsc --noEmit → clean (two errors before this PR)
• npx expo export --platform android → succeeds, confirming the removed packages were unused

The expo start step matters: without .expo/types/router.d.ts, Href falls back to
string | HrefObject and the typed-routes error can't reproduce, so tsc passes either way.

Screenshots

Not applicable - no runtime or UI change.