Create canonical wiki page Repo README

Repo-README.md

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+<!-- codex-wiki-sync:28d869366882b600c448ed50 -->
+
+> Mirrored from `/mnt/DATA/git/govoplan-files/README.md`.
+> Origin: `repository`.
+> Active tasks and changing state belong in Gitea issues; this wiki page is durable project context.
+
+---
+# govoplan-files
+
+GovOPlaN Files is the managed file module. It bundles backend storage APIs and the Files WebUI package so file features can be installed as one module.
+
+## Ownership
+
+This repository owns:
+
+- backend module manifest `files`
+- file permissions such as `files:file:read`, `files:file:upload`, `files:file:download`, `files:file:organize`, and `files:file:delete`
+- file-space, file metadata, share, upload, download, pattern matching, and transfer APIs
+- SQLAlchemy file models and module migration registration
+- WebUI package `@govoplan/files-webui`
+- `/files` route and IconRail navigation contribution
+
+Core owns auth, tenants, RBAC evaluation, database/session primitives, CSRF/API helpers, and shell layout.
+
+## Development
+
+Install through the core environment:
+
+```bash
+cd /mnt/DATA/git/govoplan-core
+./.venv/bin/python -m pip install -r requirements-dev.txt
+```
+
+Run the WebUI from the core host:
+
+```bash
+cd /mnt/DATA/git/govoplan-core/webui
+PATH=/home/zemion/.nvm/versions/node/v22.22.3/bin:$PATH /home/zemion/.nvm/versions/node/v22.22.3/bin/npm run dev
+```
+
+## Module integration
+
+Backend entry point:
+
+```toml
+[project.entry-points."govoplan.modules"]
+files = "govoplan_files.backend.manifest:get_manifest"
+```
+
+Frontend package:
+
+```text
+@govoplan/files-webui
+```
+
+The campaign module can integrate with files when both modules are installed, for example for managed attachment selection and campaign file sharing.
+
+Platform RBAC and governance rules are documented in `govoplan-core/docs/`.
+
+## Release packaging
+
+The repository root includes a `package.json` for git-based WebUI installs. It exports the package `@govoplan/files-webui` from `webui/src` so release builds can depend on tagged git refs instead of local `file:` paths.