docs: Added ADR template

docs/adr/000-template.md

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+# ADR-XXX: Title Here
+
+**Status**: Proposed | Accepted | Deprecated | Superseded
+
+**Date**: YYYY-MM-DD
+
+**Authors**: Name(s)
+
+## Context
+
+What is the issue we're seeing that motivates this decision or change?
+
+Include:
+
+- Background information
+- Problem statement
+- Constraints
+- Forces at play
+
+## Decision
+
+What is the change that we're proposing and/or doing?
+
+Be specific and clear about:
+
+- What we decided to do
+- Why this approach over alternatives
+- Key implementation details
+
+## Consequences
+
+What becomes easier or more difficult to do because of this change?
+
+### Positive
+
+- What benefits does this decision bring?
+- What problems does it solve?
+- What becomes easier?
+
+### Negative
+
+- What tradeoffs are we accepting?
+- What becomes harder?
+- What new problems might arise?
+
+### Neutral
+
+- What stays the same?
+- What is unaffected?
+
+## Alternatives Considered
+
+What other options did we evaluate?
+
+For each alternative:
+
+- Brief description
+- Why we didn't choose it
+- What would have been different
+
+## Related Decisions
+
+- ADR-XXX: [Related decision]
+- ADR-YYY: [Another related decision]
+
+## References
+
+- [Link to documentation]
+- [Link to discussion]
+- [Link to research]
+
+---
+
+## Revision History
+
+| Date | Author | Change |
+|------|--------|--------|
+| YYYY-MM-DD | [Name] | Initial proposal |
+| YYYY-MM-DD | [Name] | Accepted after review |