Support Helm chart

What's Changed

• chore: update kustomization for install to v0.2.0 by @github-actions in #194
• docs: fix docs title by @nakamasato in #195
• chore: update Makefile by @nakamasato in #198
• chore: add helm chart by @nakamasato in #199

Full Changelog: v0.2.0...v0.2.1