[next] remove README and add warning

[dyladan]

No description provided.

[codecov]

Codecov Report

Merging #4226 (73ed270) into next (543f0b4) will increase coverage by 0.01%.
Report is 4 commits behind head on next.
The diff coverage is 92.85%.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #4226      +/-   ##
==========================================
+ Coverage   92.24%   92.26%   +0.01%     
==========================================
  Files         332      332              
  Lines        9437     9434       -3     
  Branches     1999     1995       -4     
==========================================
- Hits         8705     8704       -1     
+ Misses        732      730       -2     

Files	Coverage Δ
...erimental/packages/api-logs/src/types/LogRecord.ts	100.00% <ø> (ø)
...porter-metrics-otlp-grpc/src/OTLPMetricExporter.ts	93.75% <100.00%> (+0.20%)	⬆️
...-otlp-http/src/platform/node/OTLPMetricExporter.ts	100.00% <100.00%> (ø)
...orter-metrics-otlp-proto/src/OTLPMetricExporter.ts	100.00% <100.00%> (ø)
...ges/opentelemetry-instrumentation-http/src/http.ts	94.75% <100.00%> (+0.83%)	⬆️
...ackages/otlp-exporter-base/src/OTLPExporterBase.ts	95.23% <100.00%> (ø)
...mental/packages/otlp-transformer/src/logs/index.ts	100.00% <ø> (ø)
experimental/packages/sdk-logs/src/LogRecord.ts	98.05% <100.00%> (+0.07%)	⬆️
...telemetry-sdk-trace-node/src/NodeTracerProvider.ts	100.00% <100.00%> (+5.00%)	⬆️
...kages/otlp-exporter-base/src/platform/node/util.ts	63.80% <0.00%> (-0.35%)	⬇️

... and 2 files with indirect coverage changes

[github-actions]

This PR is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[JamieDanielson]

helpful! will need a rebase but then good to go