feat(cli): rename command from 'task' to 'ty'

[bborn]

Summary

• Renames the CLI command from task to ty (shorter, easier to type)
• Updates all binary output names (e.g., bin/task → bin/ty)
• Updates CI/CD workflows for new binary naming
• Updates install scripts to download and install the ty binary
• Updates all documentation references

Files Changed

• cmd/task/main.go: Changed Cobra Use field from task to ty
• Makefile: Updated target names (build-task → build-ty), binary outputs, and daemon commands
• .github/workflows/ci.yml: Updated build output name
• .github/workflows/release.yml: Updated release binary names
• scripts/install.sh: Updated BINARY_NAME and download pattern
• docs/install.sh: Updated BINARY_NAME and download pattern
• README.md: Updated all CLI examples and references
• docs/orchestrator.md: Updated all CLI command examples
• AGENTS.md: Updated build and run documentation

Test plan

• Build completes successfully (make build-ty)
• ./bin/ty --help shows the new command name
• All tests pass (make test)

🤖 Generated with Claude Code