docs: ADR for Helm Resource implementation style (#12)

Co-authored-by: tahahawa <tahahawa@gmail.com>
Reviewed-on: #12

adr/000-ADR-Template.md

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+# Architecture Decision Record: \<Title\>
+
+Name: \<Name\>
+
+Initial Date: \<Date\>
+
+Last Updated Date: \<Date\>
+
+## Status
+
+Proposed/Pending/Accepted/Implemented
+
+## Context
+
+The problem, background, the "why" behind this decision/discussion
+
+## Decision
+
+Proposed solution to the problem
+
+## Rationale
+
+Reasoning behind the decision
+
+## Consequences
+
+Pros/Cons of chosen solution
+
+## Alternatives considered
+
+Pros/Cons of various proposed solutions considered
+
+## Additional Notes