⚙️ [Maintenance]: Add repository agent onboarding files

.github/copilot-instructions.md

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+Follow the instructions in [AGENTS.md](../AGENTS.md).

AGENTS.md

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+# Agents
+
+This repository contains the [Confluence](https://psmodule.io/Confluence/) PowerShell module.
+
+## Start here
+
+1. Read this file, then [README.md](README.md) for the module scope and usage.
+2. Read the [PSModule documentation](https://psmodule.io/docs) for framework standards and naming conventions.
+3. Read the [MSX documentation](https://msxorg.github.io/docs) for organization-level principles and ways of working.
+
+## Working in this repository
+
+- Module source lives under `src/`; tests live under `tests/`; examples live under `examples/`.
+- Keep command behavior aligned with the module's published docs and examples.
+- Prefer extending existing module patterns over introducing one-off conventions.
+
+## The rule
+
+This file points; it never defines. Standards and process live in canonical documentation and should be referenced, not duplicated here.

CLAUDE.md

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+@AGENTS.md