docs: slim README, move detail into per-app and contributor docs

README down to the Containr skeleton: header, three-screenshot row
(rest behind <details>), features, architecture, quick start, links.
Dropped tables and sections already covered by QUICK_START.md.
Native dev commands and repo layout moved to CONTRIBUTING.md;
CLI/MCP usage moved to new per-app READMEs.

Authored By: TDvorak <[email protected]>

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

apps/cli/README.md

@@ -0,0 +1,23 @@
+# @primora/cli
+
+`primora` - command-line client for a Primora deployment.
+
+## Build
+
+```bash
+npm run build --workspace @primora/cli   # → dist/cli.js
+node dist/cli.js login                   # or: npx primora login once published
+```
+
+## Auth
+
+- `primora login` - session sign-in against your deployment.
+- `primora login --api-key prm_…` - or export `PRIMORA_API_KEY`.
+
+Context lives in `~/.config/primora/config.json`; `primora use` picks org +
+project interactively.
+
+## Commands
+
+`orgs`, `projects`, `buckets`, `objects` (list/upload/download/rm), `keys`,
+`audit list --follow`. Every command accepts `--json`.