Re-export type Transition in root

[Huliiiiii]

Summary

Re-export the type Transition from signal.js

This allows

import type { Transition } from "solid-js"

instead of

import type { Transition } from "solid-js/types/reactive/signal.d.ts"

How did you test this change?

[coveralls]

Pull Request Test Coverage Report for Build 15089892509

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 85.752%

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Totals
Change from base Build 15072467978:	0.0%
Covered Lines:	2333
Relevant Lines:	2652

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💛 - Coveralls