The cross-spawn-spawner module has been moved from src/effect/ to src/
to simplify the core package structure. The src/types.d.ts file which
contained unused type declarations has also been removed. All imports
throughout the codebase have been updated to reflect the new location.
This change reduces the package's internal complexity by flattening the
module hierarchy and removing dead code, making future maintenance easier.
Moved the cross-spawn-spawner module from packages/opencode to packages/core
to enable code sharing across the monorepo. This consolidates the process
spawning infrastructure into the core package so other packages can use
cross-platform child process spawning without duplicating the implementation.
Updated all import statements across the codebase to reference the new
location (@opencode-ai/core/effect/cross-spawn-spawner). Removed the
local copy from the opencode package along with its tests.
