Add jira-cli and slack-cli integration examples with bootstrap scripts (#13)

* Initial plan

* Add comprehensive examples for kitproj/jira-cli and kitproj/slack-cli integration

Co-authored-by: alexec <1142830+alexec@users.noreply.github.com>

* Fix incorrect variable in deployment notification example

Co-authored-by: alexec <1142830+alexec@users.noreply.github.com>

* Address code review feedback: fix duplicate task names and multi-line string formatting

Co-authored-by: alexec <1142830+alexec@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: alexec <1142830+alexec@users.noreply.github.com>

Author: Copilot