Add /beta entry point to fluid-framework

[CraigMacomber]

Description

Add /beta entry point to fluid-framework with tree's beta items

Reviewer Guidance

The review process is outlined on this wiki page.

[github-actions[bot]]

🔗 Found some broken links! 💔

Run a link check locally to find them. See https://github.com/microsoft/FluidFramework/wiki/Checking-for-broken-links-in-the-documentation for more information.

linkcheck output

> fluidframework-docs@0.25.0 ci:linkcheck /home/runner/work/FluidFramework/FluidFramework/docs
> start-server-and-test ci:start 1313 linkcheck:full

1: starting server using command "npm run ci:start"
and when url "[ 'http://127.0.0.1:1313' ]" is responding with HTTP status code 200
running tests using command "npm run linkcheck:full"

> fluidframework-docs@0.25.0 ci:start
> http-server ./public --port 1313 --silent

> fluidframework-docs@0.25.0 linkcheck:full
> npm run linkcheck:fast -- --external

> fluidframework-docs@0.25.0 linkcheck:fast
> linkcheck http://localhost:1313 --skip-file skipped-urls.txt --external

Crawling...

http://localhost:1313/docs/build/overview/
- (3349:27) '@fluidfr..' => https://www.npmjs.com/package/@fluidframework/tinylicious-client (HTTP 429)
- (3353:19) '@fluidfr..' => https://www.npmjs.com/package/@fluidframework/azure-client (HTTP 429)

Stats:
  402260 links
    3130 destination URLs
       2 URLs ignored
       0 warnings
       2 errors

 ELIFECYCLE  Command failed with exit code 1.

[msfluid-bot]

⯅ @fluid-example/bundle-size-tests: +245 Bytes

Metric Name	Baseline Size	Compare Size	Size Diff
aqueduct.js	460.26 KB	460.29 KB	⯅ +35 Bytes
azureClient.js	558.25 KB	558.29 KB	⯅ +49 Bytes
connectionState.js	680 Bytes	680 Bytes	■ No change
containerRuntime.js	261.02 KB	261.04 KB	⯅ +14 Bytes
fluidFramework.js	401.41 KB	401.42 KB	⯅ +14 Bytes
loader.js	134.24 KB	134.25 KB	⯅ +14 Bytes
map.js	42.43 KB	42.44 KB	⯅ +7 Bytes
matrix.js	146.58 KB	146.58 KB	⯅ +7 Bytes
odspClient.js	525.54 KB	525.58 KB	⯅ +49 Bytes
odspDriver.js	97.85 KB	97.87 KB	⯅ +21 Bytes
odspPrefetchSnapshot.js	42.81 KB	42.82 KB	⯅ +14 Bytes
sharedString.js	163.3 KB	163.31 KB	⯅ +7 Bytes
sharedTree.js	391.87 KB	391.88 KB	⯅ +7 Bytes
Total Size	3.3 MB	3.3 MB	⯅ +245 Bytes

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Baseline commit: 749e527092bea420879392bdbf76582349334f65

Generated by :no_entry_sign: dangerJS against 283bc8b35ce72d68f28230ec41ffff4aee4c44e9