docs: centralize contribution guidance

Author: MariusStorhaug

.github/CONTRIBUTING.md

@@ -1,12 +1,9 @@
 # Contributing
 
-Follow the central [MSX contribution workflow](https://msx.no/docs/Ways-of-Working/Contribution-Workflow/)
-for how to select work, create a branch, make commits, open a draft pull request, request review,
-and merge changes. Use the [MSX Ways of Working](https://msx.no/docs/Ways-of-Working/) for the
-shared issue, branching, commit, pull request, and review conventions.
+Read the [README](../README.md) to understand this repository.
 
-Use the Process-PSModule documentation for repository-specific standards:
+Follow the central [MSX contribution workflow](https://msx.no/docs/Ways-of-Working/Contribution-Workflow/)
+and [MSX Ways of Working](https://msx.no/docs/Ways-of-Working/) for shared contribution guidance.
 
-- [Repository Standard](https://psmodule.io/Process-PSModule/reference/repository-standard/)
-- [PowerShell module standard](https://psmodule.io/Process-PSModule/reference/powershell-module-standard/)
-- [Validating before review](https://psmodule.io/Process-PSModule/guides/validating-before-review/)
+For framework-specific guidance, review the
+[Process-PSModule documentation](https://psmodule.io/Process-PSModule/).

AGENTS.md

@@ -6,7 +6,3 @@ Read in this order:
    - what this repository is and what it contains
 2. [`.github/CONTRIBUTING.md`](.github/CONTRIBUTING.md)
    - how a change is made and reviewed
-3. [Process-PSModule documentation](https://psmodule.io/Process-PSModule/)
-   - repository structure, module standards, and build/test/pack/publish guidance
-4. [MSXOrg documentation](https://msx.no/docs/)
-   - central ways of working and coding standards