docs: add starlight-versions

[mkurapov]

Changes proposed in this pull request

• Add v1-beta and v2-beta (latest) versioning to the Rafiki docs
• The generated Admin APIs (backend & auth) for v1-beta use the specs from v1.2.0-beta version, v2-beta (latest) version use the specs from main branch

Context

Fixes #3504 | RAF-1104
Fixes interledger/docs-design-system#49

Checklist

• Related issues linked using fixes #number
• Tests added/updated
• Make sure that all checks pass
• Bruno collection updated (if necessary)
• Documentation issue created with user-docs label (if necessary)
• OpenAPI specs updated (if necessary)

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[github-actions]

🚀 Performance Test Results

Test Configuration:

• VUs: 4
• Duration: 1m0s

Test Metrics:

• Requests/s: 43.01
• Iterations/s: 14.34
• Failed Requests: 0.00% (0 of 2585)

📜 Logs

> [email protected] run-tests:testenv /home/runner/work/rafiki/rafiki/test/performance
> ./scripts/run-tests.sh -e test "-k" "-q" "--vus" "4" "--duration" "1m"

Cloud Nine GraphQL API is up: http://localhost:3101/graphql
Cloud Nine Wallet Address is up: http://localhost:3100/
Happy Life Bank Address is up: http://localhost:4100/
cloud-nine-wallet-test-backend already set
cloud-nine-wallet-test-auth already set
happy-life-bank-test-backend already set
happy-life-bank-test-auth already set
     data_received..................: 933 kB 16 kB/s
     data_sent......................: 2.0 MB 33 kB/s
     http_req_blocked...............: avg=5.89µs   min=2.34µs   med=5.17µs   max=253.12µs p(90)=6.34µs   p(95)=6.8µs   
     http_req_connecting............: avg=293ns    min=0s       med=0s       max=178.17µs p(90)=0s       p(95)=0s      
     http_req_duration..............: avg=92.38ms  min=6.5ms    med=76.52ms  max=590.13ms p(90)=158.93ms p(95)=178.77ms
       { expected_response:true }...: avg=92.38ms  min=6.5ms    med=76.52ms  max=590.13ms p(90)=158.93ms p(95)=178.77ms
     http_req_failed................: 0.00%  ✓ 0         ✗ 2585
     http_req_receiving.............: avg=87.18µs  min=28.18µs  med=78.66µs  max=1.47ms   p(90)=118.14µs p(95)=140.25µs
     http_req_sending...............: avg=36.36µs  min=9.9µs    med=28.03µs  max=2.24ms   p(90)=41.14µs  p(95)=56.04µs 
     http_req_tls_handshaking.......: avg=0s       min=0s       med=0s       max=0s       p(90)=0s       p(95)=0s      
     http_req_waiting...............: avg=92.26ms  min=6.32ms   med=76.39ms  max=590.06ms p(90)=158.79ms p(95)=178.68ms
     http_reqs......................: 2585   43.005053/s
     iteration_duration.............: avg=278.69ms min=171.42ms med=267.18ms max=1.15s    p(90)=339.46ms p(95)=372.51ms
     iterations.....................: 862    14.340563/s
     vus............................: 4      min=4       max=4 
     vus_max........................: 4      min=4       max=4