feat: provide a helm chart for percas over k8s

[ScopeDB-worm]

Have a try with the following command:

cd deploy/helm && make example/install

Tests and pipelines will be added in later PRs.

[tisonkun]

Some license headers missing. Can run cargo x lint --fix to fix. Or determinate the concrete issue so I can help.

[tisonkun]

May add a simple usage doc? The PR description contains some info I see.

[ScopeDB-worm]

Auto packaging isn't done in this PR. Hence there might not be a generally available way to use the chart now. The PR description demonstrates the way for developers to try it, which requires a bit more knowledge than common users.

Will add it after CI/CD is set up.

[ScopeDB-worm]

Some license headers missing. Can run cargo x lint --fix to fix. Or determinate the concrete issue so I can help.

Seems Hawkeye didn't recognise the license header in Helm template format (e.g., what in the headless-service.yaml). I think for now the best solution is to exclude the deploy/helm from the check.

[tisonkun]

@ScopeDB-worm Is this ready for merge now?

[ScopeDB-worm]

@ScopeDB-worm Is this ready for merge now?

Yes!

[tisonkun]

Merged. Thanks for your contribution!