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: 44.58
• Iterations/s: 14.86
• Failed Requests: 0.00% (0 of 2680)

📜 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..................: 967 kB 16 kB/s
     data_sent......................: 2.1 MB 34 kB/s
     http_req_blocked...............: avg=6.51µs   min=2.26µs   med=5.28µs   max=878.83µs p(90)=6.37µs   p(95)=6.97µs  
     http_req_connecting............: avg=340ns    min=0s       med=0s       max=484µs    p(90)=0s       p(95)=0s      
     http_req_duration..............: avg=89.07ms  min=8.38ms   med=72.11ms  max=514.05ms p(90)=150.28ms p(95)=179.25ms
       { expected_response:true }...: avg=89.07ms  min=8.38ms   med=72.11ms  max=514.05ms p(90)=150.28ms p(95)=179.25ms
     http_req_failed................: 0.00%  ✓ 0         ✗ 2680
     http_req_receiving.............: avg=90.93µs  min=26.18µs  med=79.89µs  max=1.98ms   p(90)=115.79µs p(95)=144.02µs
     http_req_sending...............: avg=33.11µs  min=9.1µs    med=27.62µs  max=1.24ms   p(90)=39.45µs  p(95)=52.01µs 
     http_req_tls_handshaking.......: avg=0s       min=0s       med=0s       max=0s       p(90)=0s       p(95)=0s      
     http_req_waiting...............: avg=88.94ms  min=8.17ms   med=71.93ms  max=513.96ms p(90)=150.18ms p(95)=179.1ms 
     http_reqs......................: 2680   44.583633/s
     iteration_duration.............: avg=268.96ms min=172.68ms med=254.54ms max=1.03s    p(90)=335.45ms p(95)=363.15ms
     iterations.....................: 893    14.855666/s
     vus............................: 4      min=4       max=4 
     vus_max........................: 4      min=4       max=4