Prevent boards product from being included automatically (#23539)

* Prevent boards product from being included automatically

* Fix config diff test

* Update prepackaged plugin version

Co-authored-by: Scott Bishel <scott.bishel@mattermost.com>

* Readd boards/dist to the gitignore

* Does not enable the focalboard plugin by default

* Update plugin version to v7.10.3

---------

Co-authored-by: Scott Bishel <scott.bishel@mattermost.com>

webapp/README.md

@@ -1,6 +1,6 @@
 # Mattermost Web App
 
-This folder contains the client code for the Mattermost web app. It's broken up into multiple packages each of which either contains an area of the app (such as `playbooks` or `boards`) or shared logic used across other packages (such as the packages located in the `platform` directory). For anyone who's used to working in [the mattermost/mattermost-webapp repo](https://github.com/mattermost/mattermost-webapp), most of that is now located in `channels`.
+This folder contains the client code for the Mattermost web app. It's broken up into multiple packages each of which either contains an area of the app (such as `playbooks`) or shared logic used across other packages (such as the packages located in the `platform` directory). For anyone who's used to working in [the mattermost/mattermost-webapp repo](https://github.com/mattermost/mattermost-webapp), most of that is now located in `channels`.
 
 ## npm Workspaces
 
@@ -8,7 +8,7 @@ To interact with a workspace using npm, such as to add a dependency or run a scr
 
 ```sh
 # Add a dependency to a single package
-npm add react --workspace=boards
+npm add react --workspace=playbooks
 
 # Build multiple packages
 npm run build --workspace=platform/client --workspace=platform/components