[WIRE-422] Custom templates support

[rjtokenring]

Motivation

Support for custom template lifecycle

Reviewer checklist

• PR address a single concern.
• PR title and description are properly filled.
• Changes will be merged in main.
• Changes are covered by tests.
• Logging is meaningful in case of troubleshooting.
• History is clean, commit messages are meaningful (see CONTRIBUTING.md) and are well formatted.

[mirkokurt]

Wow, this is a great work! Thank you for adding this feature.
Since this is an entirely new use case for the Cloud-cli, what do you think about adding a new section in the readme explaining how to handle custom templates?

[mirkokurt]

Did you intentionally put the sitewise template in the repo as example?

[rjtokenring]

No, it was my error... this is a test template used in manual test. Removed, thanks.

[rjtokenring]

Wow, this is a great work! Thank you for adding this feature. Since this is an entirely new use case for the Cloud-cli, what do you think about adding a new section in the readme explaining how to handle custom templates?

Yes, will add