v0.14.0

What's Changed

• docs: add copilot-instructions and improve README by @spiegel-im-spiegel in #20
• ci: replace legacy workflows with ci.yml and codeql.yml by @spiegel-im-spiegel in #21
• refactor: fix comment style to idiomatic Go by @spiegel-im-spiegel in #22
• build: bump Go version from 1.20 to 1.25 by @spiegel-im-spiegel in #23
• deprecate: mark signal package as deprecated by @spiegel-im-spiegel in #24
• test: add subprocess tests for Exit and ExitIfNotNormal by @spiegel-im-spiegel in #25

Full Changelog: v0.13.0...v0.14.0