⬆️(deps) align react-aria and drop the @adobe/react-spectrum chain

[sylvinus]

Problem

packages/react exact-pins the react-aria ecosystem at stale versions.
Two consequences in consuming apps:

1. Version fragmentation — cunningham pins react-stately@3.45.0,
   ui-kit pins 3.37.0, apps pull others; npm/yarn can't hoist one copy
   and nest dozens (the @react-aria/* tree alone duplicated to ~1.9 GB).
2. Unused Adobe React Spectrum pulled in — @react-aria/calendar@3.9.5
   / @react-aria/datepicker@3.16.1 (and their @react-stately/* siblings)
   still depend on the mispackaged @react-types/button@3.16.0, which
   depends on @react-spectrum/button → @adobe/react-spectrum (the full
   component suite). Nothing uses Spectrum; it's pure transitive bloat.

Measured in a consuming app: node_modules 3.2 GB → 0.65 GB, with
@adobe/react-spectrum, @react-spectrum/*, @spectrum-icons/* fully
removed.

Change

Align every react-aria package to a single consistent release. The key
constraint: react-aria's meta packages exact-pin react-stately
internally, and react-aria@3.50.0 + react-aria-components@1.19.0 are
the latest pair that agree on react-stately@3.48.0.

package	before	after
react-aria	3.47.0	3.50.0
react-aria-components	1.16.0	1.19.0
react-stately	3.45.0	3.48.0
@internationalized/date	3.12.0	3.12.2
@react-aria/calendar	3.9.5	3.10.1 ← drops @adobe
@react-aria/datepicker	3.16.1	3.17.1 ← drops @adobe
@react-stately/calendar	3.9.3	3.10.1 ← drops @adobe
@react-stately/datepicker	3.16.1	3.17.1 ← drops @adobe
@react-aria/i18n	3.12.16	3.13.1

The calendar/datepicker bumps are what sever the @react-types/* → @adobe
edge. No source or API changes.

Lockfile

yarn.lock regenerated: @adobe/react-spectrum, @react-spectrum/*,
@spectrum-icons/* are gone; single react-stately@3.48.0. yarn build +
yarn test green.