feat: move video.js to peer dependencies

`video.js` is no longer bundled with pillarbox-web and must be installed by the
consuming project.

Previously, `pillarbox-web` declared `video.js` as a regular dependency with a fixed version. This
caused issues in projects that also included other `video.js` plugins or UI components, as multiple
conflicting instances of `video.js` could be installed, leading to runtime errors and unexpected
behavior.

By making `video.js` a peer dependency, we ensure that only one instance is used in the final
bundle, allowing integrators to manage the version themselves and avoid conflicts. This approach is
more flexible and consistent with the fact that integrators are responsible for providing their own
UI components.

We continue to hardcode the `videojs-contrib-eme` plugin to ensure consistent DRM behavior across
implementations.

The recommended and tested version of `video.js` remains `8.21.0` at this moment, the documentation
has been updated to reflect this.

Author: jboix

README.md

@@ -10,12 +10,19 @@ experience of SRGSSR content, making it more accessible and feature-rich.
 
 ## Quick Start
 
-To get started with Pillarbox, install it through the following command:
+To get started with Pillarbox, install it along with `video.js` using the following command:
 
 ```bash
-npm install --save @srgssr/pillarbox-web
+npm install --save @srgssr/pillarbox-web video.js@8.21.0
 ```
 
+> [!NOTE]
+> `video.js` is now a peer dependency and must be installed by the project that bundles Pillarbox.
+> Version 8.21.0 is the version we use to test the player and is the one we recommend.
+> 
+> This approach is more flexible and consistent with the fact that integrators are responsible for 
+> providing their own UI components.
+
 In your HTML file, add the following code to initialize Pillarbox:
 
 ```html

docs/api/index.md

@@ -5,12 +5,20 @@ Video.js.
 
 ## Quick Guide
 
-To get started with Pillarbox, install it through the following command:
+
+To get started with Pillarbox, install it along with `video.js` using the following command:
 
 ```bash
-npm install --save @srgssr/pillarbox-web
+npm install --save @srgssr/pillarbox-web video.js@8.21.0
 ```
 
+> [!NOTE]
+> `video.js` is now a peer dependency and must be installed by the project that bundles Pillarbox.
+> Version 8.21.0 is the version we use to test the player and is the one we recommend.
+>
+> This approach is more flexible and consistent with the fact that integrators are responsible for
+> providing their own UI components.
+
 In your HTML file, add the following code to initialize Pillarbox:
 
 ```html