chore: ROOT-204: update readmes for v2.x examples

[robot-ci-heartex]

This PR was automatically generated via Follow Merge. Workflow Run
Please ensure that all linked upstream Pull Requests are merged before proceeding with this one.

• chore: ROOT-204: update readmes for v2.x examples label-studio-sdk#638

[netlify]

✅ Deploy Preview for heartex-docs canceled.

Name	Link
🔨 Latest commit	c9fafbd
🔍 Latest deploy log	https://app.netlify.com/projects/heartex-docs/deploys/68e3ba7c4daab200088617d7

[netlify]

✅ Deploy Preview for label-studio-storybook canceled.

Name	Link
🔨 Latest commit	c9fafbd
🔍 Latest deploy log	https://app.netlify.com/projects/label-studio-storybook/deploys/68e3ba7c9a80a5000853a498

[netlify]

✅ Deploy Preview for label-studio-docs-new-theme canceled.

Name	Link
🔨 Latest commit	c9fafbd
🔍 Latest deploy log	https://app.netlify.com/projects/label-studio-docs-new-theme/deploys/68e3ba7c28623e0008ce133c

[netlify]

✅ Deploy Preview for label-studio-playground canceled.

Name	Link
🔨 Latest commit	c9fafbd
🔍 Latest deploy log	https://app.netlify.com/projects/label-studio-playground/deploys/68e3ba7cafbb24000864b78f

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.69%. Comparing base (99f457e) to head (c9fafbd).
⚠️ Report is 2 commits behind head on develop.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #8596       +/-   ##
============================================
+ Coverage    67.42%   79.69%   +12.27%     
============================================
  Files          782      238      -544     
  Lines        60005    21537    -38468     
  Branches     10161        0    -10161     
============================================
- Hits         40458    17164    -23294     
+ Misses       19544     4373    -15171     
+ Partials         3        0        -3     

Flag	Coverage Δ
lsf-e2e	?
lsf-integration	?
lsf-unit	?
pytests	79.69% <ø> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.