Tidy dependencies. Dropped external ToledoTool.

• updated to SwiftSyntax 508.0.0
• removed external ToledoTool dependency and replaced it with an executableTarget

v1.1.0

• removed actors in favor for a mixed Swift concurrency/semaphore approach
• added support for protocol dependencies
• changed the replace provider api

Initial release

v1.0.0

v1.0.0