Add monorepo structure to the README.

Update `@plone/components`'s URLs in its `package.json`.
Update the monorepo structure file tree.

README.md

@@ -36,6 +36,33 @@ You can build your own or choose from the community released ones:
 You can try a Volto online demo at [https://demo.plone.org/](https://demo.plone.org/).
 
 
+## Monorepo structure
+
+Since version 18.0.0-alpha4, the Volto core repository has had the shape of a monorepo, where "mono" means "single" and "repo" is short for "repository".
+This means that several apps and libraries related to each other are stored in the same repository.
+They are managed together but released individually.
+This allows the code to be shared effectively, and unifies tracking of changes across all of the apps and libraries.
+
+Some packages released to npm were previously in separate repositories, but are now included in this monorepo.
+They include the following items.
+
+| Package | Location |
+|---|---|
+| [`@plone/client`](https://www.npmjs.com/package/@plone/client) | [`packages/client`](https://github.com/plone/volto/tree/main/packages/client#readme) |
+| [`@plone/components`](https://www.npmjs.com/package/@plone/components) | [`packages/components`](https://github.com/plone/volto/tree/main/packages/components#readme) |
+| [`@plone/generator-volto`](https://www.npmjs.com/package/@plone/generator-volto) | [`packages/generator-volto`](https://github.com/plone/volto/tree/main/packages/generator-volto#readme) |
+| [`@plone/helpers`](https://www.npmjs.com/package/@plone/helpers) | [`packages/helpers`](https://github.com/plone/volto/tree/main/packages/helpers#readme) |
+| [`@plone/providers`](https://www.npmjs.com/package/@plone/providers) | [`packages/providers`](https://github.com/plone/volto/tree/main/packages/providers#readme) |
+| [`@plone/registry`](https://www.npmjs.com/package/@plone/registry) | [`packages/registry`](https://github.com/plone/volto/tree/main/packages/registry#readme) |
+| [`@plone/scripts`](https://www.npmjs.com/package/@plone/scripts) | [`packages/scripts`](https://github.com/plone/volto/tree/main/packages/scripts#readme) |
+| [`@plone/types`](https://www.npmjs.com/package/@plone/types) | [`packages/types`](https://github.com/plone/volto/tree/main/packages/types#readme) |
+| n/a | [`packages/volto-guillotina`](https://github.com/plone/volto/tree/main/packages/volto-guillotina) |
+| [`@plone/volto-slate`](https://www.npmjs.com/package/@plone/volto-slate) | [`packages/volto-slate`](https://github.com/plone/volto/tree/main/packages/volto-slate#readme) |
+| [`@plone/volto-testing`](https://www.npmjs.com/package/@plone/volto-testing) | [`packages/volto-testing`](https://github.com/plone/volto/tree/main/packages/volto-testing) |
+
+See also [Monorepo structure](https://6.docs.plone.org/volto/contributing/developing-core.html#monorepo-structure).
+
+
 ## Create a Volto project
 
 To start a new project using Volto, follow the [Plone installation documentation](https://6.docs.plone.org/install/create-project.html).

docs/source/contributing/developing-core.md

@@ -42,32 +42,35 @@ The workspaces are located in the `packages` or `apps` folder.
 ### Folder layout
 
 Volto has the following folder structure.
+The package `volto` is the core code of Volto.
 
 ```text
-(volto-monorepo)/
+/
 ├─ apps/
-│  ├─ plone
 │  ├─ nextjs
 │  ├─ remix
-│  └─ rr7
+│  ├─ rr7
+│  ├─ vite
+│  └─ vite-ssr
+├─ ...
 ├─ packages/
-│  ├─ volto
+│  ├─ blocks
 │  ├─ client
 │  ├─ components
-│  ├─ registry
-│  ├─ types
 │  ├─ coresandbox
 │  ├─ generator-volto
+│  ├─ helpers
+│  ├─ providers
+│  ├─ registry
 │  ├─ scripts
+│  ├─ slots
+│  ├─ theming
 │  ├─ tsconfig
+│  ├─ types
+│  ├─ volto
 │  ├─ volto-guillotina
 │  ├─ volto-slate
 │  └─ volto-testing
-├─ .gitignore
-├─ package.json
-├─ pnpm-workspace.yaml
-├─ turbo.json
-├─ tsconfig.json
 ├─ ...
 ```
 

packages/components/package.json

@@ -11,10 +11,10 @@
   "version": "3.0.0",
   "repository": {
     "type": "git",
-    "url": "http://github.com/plone/components.git"
+    "url": "http://github.com/plone/volto.git"
   },
   "bugs": {
-    "url": "https://github.com/plone/components/issues"
+    "url": "https://github.com/plone/volto/issues"
   },
   "type": "module",
   "files": [