chore: add claude skill for changelog analysis

[kb-newrelic]

Summary

• Adds a claude skill to generate message like this one for version bump PRs.
• Bash script to fetch changelog is necessary to not overload context

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Example message for #488

Contrib v0.143.0

🛑 Breaking changes 🛑

• processor/tail_sampling: Add support for caching the policy name involved in a sampling decision. (#45040)
  This change allows the tailsampling.policy attribute to be set on the spans in a trace when a sampling decision is cached.

• receiver/prometheus: Remove deprecated use_start_time_metric and start_time_metric_regex configuration options. (#44180)
  The use_start_time_metric and start_time_metric_regex configuration options have been removed after being deprecated in v0.142.0.
  Users who have these options set in their configuration will experience collector startup failures after upgrading.
  To migrate, remove these configuration options and use the metricstarttime processor instead for equivalent functionality.

🧰 Bug fixes 🧰

• exporter/loadbalancing: Fix k8s resolver parsing so loadbalancing exporter works with service FQDNs (#44472)

Contrib v0.144.0

🛑 Breaking changes 🛑

• processor/tail_sampling: The deprecated invert decisions are disabled by default. (#44132)
  Drop policies should be used instead of invert decisions for explicitly not sampling a trace.
  If the deprecated behavior is required while migrating to drop policies, disable the processor.tailsamplingprocessor.disableinvertdecisions feature gate.

🧰 Bug fixes 🧰

• processor/resourcedetection: Prevent the resource detection processor from panicking when detectors return a zero-valued pdata resource. (#41934) Note: Because of opentelemetry-collector-releases#1350 this change is not available on the v0.144.0 binary releases. v0.145.0 will include this change.

• processor/resourcedetection: Fix nil pointer panic when HTTP client creation fails in Start method (#45220) Note: Because of opentelemetry-collector-releases#1350 this change is not available on the v0.144.0 binary releases. v0.145.0 will include this change.

Core v0.144.0

🚩 Deprecations 🚩

• exporter/otlp_grpc: Rename otlp exporter to otlp_grpc exporter and add deprecated alias otlp. (#14403)

• exporter/otlp_http: Rename otlphttp exporter to otlp_http exporter and add deprecated alias otlphttp. (#14396)

[mailo-nr]

LGTM, just added a couple comments.

[mailo-nr]

LGTM