Update some WebVR docs to relate to the more modern WebXR

[zfox23]

Description

Updates some documentation to refer to WebXR rather than WebVR; Updates some sidebar links to previously-undiscoverable WebXR guides.

Motivation

• Keep folks up-to-date with the latest WebXR APIs
• Improve discoverability of important content

Additional details

This work came out of a comment on @bsmth's #30696.

Related issues and pull requests

Must be merged with mdn/yari#10111

[github-actions]

Preview URLs

• /en-US/docs/Games/Techniques/3D_on_the_web/Building_up_a_basic_demo_with_A-Frame
• /en-US/docs/Games/Techniques/3D_on_the_web/WebXR
• /en-US/docs/Games/Techniques/3D_on_the_web

External URLs (9)

URL: /en-US/docs/Games/Techniques/3D_on_the_web
Title: 3D games on the Web

• https://www.meta.com/quest/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Games/Techniques/3D_on_the_web/Building_up_a_basic_demo_with_A-Frame
Title: Building up a basic demo with A-Frame

• https://aframe.io/ (2 times) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Games/Techniques/3D_on_the_web/WebXR
Title: WebXR — Virtual and Augmented Reality for the Web

• https://aframe.io/ (1 time) (Note! This may be a new URL 👀)
• https://mixedreality.mozilla.org/ (1 time) (Note! This may be a new URL 👀)
• https://mozvr.github.io/webvr-spec/webvr.html (1 time) (Note! This may be a new URL 👀)
• https://threejs.org/docs/ (1 time) (Note! This may be a new URL 👀)
• https://twitter.com/tojiro (1 time) (Note! This may be a new URL 👀)
• https://twitter.com/vvuk (1 time) (Note! This may be a new URL 👀)
• https://webvr.info/ (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2023-12-04 17:28:03)

[bsmth]

Taking a look now 👀

[bsmth]

If you think this is a better resource than Three.js, we could list it first as people might assume we're ordering by importance. What do you reckon?

[zfox23]

great suggestion! i think it's a good idea to put the A-Frame resource first, even if A-Frame is less popular than threejs:

1. our a-frame resource is first-party (i.e. hosted on MDN), which is always good
2. the a-frame resource is more beginner-oriented and complete

in terms of "importance" - i don't have a strong opinion about which resource is more "important," or what that would even mean 🤔 and because of the above reasons, i don't want to think about "importance" right now 😅. lemme make this swap, please hold...

[bsmth]

[non-blocking] Not sure if we have a policy on removing deprecated APIs from groupData, but I noticed it's (WebVR API) the only one here:

[bsmth]

Some open suggestions for your consideration, but leaving a +1 in advance. Thank you! 👍🏻