[MAINTAINER] Add devcontainer

[esigo]

Fixes #3118 (issue)

Changes

bazelisk-linux-amd64 test --copt=-DENABLE_LOGS_PREVIEW --test_output=errors --cache_test_results=no --copt=-DENABLE_TEST //exporters/otlp/...

bash ci/do_ci.sh cmake.exporter.otprotocol.test

For significant contributions please make sure you have completed the following items:

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

[netlify]

✅ Deploy Preview for opentelemetry-cpp-api-docs canceled.

Name	Link
🔨 Latest commit	5f5909b
🔍 Latest deploy log	https://app.netlify.com/sites/opentelemetry-cpp-api-docs/deploys/6788217838d42d0008815035

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.71%. Comparing base (95baed7) to head (5f5909b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3123   +/-   ##
=======================================
  Coverage   87.71%   87.71%           
=======================================
  Files         198      198           
  Lines        6271     6271           
=======================================
  Hits         5500     5500           
  Misses        771      771           

[marcalff]

LGTM, thanks for the tooling and doc.