i18n(uk): add missing files, translate P4 root docs

- Copy code/image/config files across all modules
- Translate brand-voice and code-review templates
- Translate CONTRIBUTING, CODE_OF_CONDUCT, SECURITY, STYLE_GUIDE
- Copy CHANGELOG as-is (technical log)

Ref: luongnv89/claude-howto#63

uk/07-plugins/documentation/templates/adr-template.md

@@ -0,0 +1,39 @@
+# ADR [Number]: [Title]
+
+## Status
+[Proposed | Accepted | Deprecated | Superseded]
+
+## Context
+What is the issue that we're seeing that is motivating this decision or change?
+
+## Decision
+What is the change that we're proposing and/or doing?
+
+## Consequences
+What becomes easier or more difficult to do because of this change?
+
+### Positive
+- Benefit 1
+- Benefit 2
+
+### Negative
+- Drawback 1
+- Drawback 2
+
+### Neutral
+- Consideration 1
+- Consideration 2
+
+## Alternatives Considered
+What other options were considered and why were they not chosen?
+
+### Alternative 1
+Description and reason for not choosing.
+
+### Alternative 2
+Description and reason for not choosing.
+
+## References
+- Related ADRs
+- External documentation
+- Discussion links