feat: signals feature

[octoper]

Closes #

Summary

Changes

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/openworkflowdev/openworkflow/@openworkflow/cli@350

npm i https://pkg.pr.new/openworkflowdev/openworkflow/@openworkflow/dashboard@350

npm i https://pkg.pr.new/openworkflowdev/openworkflow@350

commit: 4338ac2

[codecov]

Codecov Report

❌ Patch coverage is 78.94737% with 16 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
packages/openworkflow/sqlite/backend.ts	0.00%	8 Missing and 2 partials ⚠️
packages/openworkflow/worker/execution.ts	92.50%	3 Missing ⚠️
packages/openworkflow/client/client.ts	75.00%	2 Missing ⚠️
packages/openworkflow/postgres/backend.ts	90.90%	1 Missing ⚠️

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