Release v1.0.0

[lalitb]

Fixes # (issue)

TC Review : #946

Changes

( From the CHANGELOG.md )

API

• Document DefaultSpan, remove DefaultTracer (#959)
• Separate baggage<->Context api from Baggage Propagator (#963)
• Remove unused public API to_span_ptr (#964)
• 💥 Make span context management public (#967)
• Support determining parent span from Context while creating new Span (#969)
• 💥 Traces: Add note on experimental semantic convention implementation, prefix semantics headers with experimental tag (#970)

SDK

• Cleanup GetEnvironmentVariable and remove unused variable under NO_GETENV (#976)
• 💥 Resources: Add note on experimental semantic convention implementation, prefix semantics headers with experimental tag (#970)

OTLP Exporter

• 🐛 Ignore status description if status code is not Error (#962)
• 💥 Make Otlp exporter configuration environment variables specs-compliant (#974)

Zipkin Exporter

• 🐛 Don't set parentId in case parentId is empty (#943)
• 🚀 Extend zipkin exporter with ability to provide headers (#951)

DOCS

• 📖 Add Getting started documentation for SDK: (#942)
• 📖 Remove unnecessary spaces and spelling of gRPC in README (#965)

BUILD

• Disable bazel build for gcc 4.8, upgrade versions for grpc(v1.39.1) and bazel(4.2.0), document bazel support (#953)
• Move CMake config template to cmake folder (#958)
• Enable CMake to search the new package variable <PackageName>_ROOT (#975)
• 🐛 Do not override CMAKE_CXX_STANDARD (#977)

🚧 Experiemental Features (Will change in future)

• Semantic Conventions for traces - As the specs is still experimental, the implementation will change in future.
• Semantic Convention for resource - As the specs is still experimental, the implementation will change in future.
• Logs and Metrics API & SDK - These are not compliant, and are behind feature flag. Not recommended to use for now.

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

[reyang]

🥇 💯 👍 🎆

[codecov]

Codecov Report

Merging #980 (0b09d7c) into main (43d8fe4) will not change coverage.
The diff coverage is n/a.

❗ Current head 0b09d7c differs from pull request most recent head 7eee01b. Consider uploading reports for the commit 7eee01b to get more accurate results

@@           Coverage Diff           @@
##             main     #980   +/-   ##
=======================================
  Coverage   95.38%   95.38%           
=======================================
  Files         161      161           
  Lines        6817     6817           
=======================================
  Hits         6502     6502           
  Misses        315      315           

Impacted Files	Coverage Δ
ext/test/zpages/tracez_data_aggregator_test.cc	96.40% <ø> (ø)