feat: OpenTelemetry Spec

Author: AbhiPrasad

src/components/sidebar.tsx

@@ -226,6 +226,7 @@ export default () => {
           <SidebarLink to="/sdk/performance/" title="Performance">
             <SidebarLink to="/sdk/performance/span-operations/">Span Operations</SidebarLink>
             <SidebarLink to="/sdk/performance/dynamic-sampling-context/">Dynamic Sampling Context</SidebarLink>
+            <SidebarLink to="/sdk/performance/opentelemetry/">OpenTelemetry Support</SidebarLink>
           </SidebarLink>
           <SidebarLink to="/sdk/event-payloads/" title="Event Payloads">
             <SidebarLink to="/sdk/event-payloads/transaction/">

src/docs/sdk/performance/opentelemetry.mdx

@@ -0,0 +1,35 @@
+---
+title: "OpenTelemetry Support"
+---
+
+<Alert level="warning">
+
+This page is under active development. Specifications are not final and subject to change.
+
+"Proof is in the progress" - Drake
+
+</Alert>
+
+This document details Sentry's work in integrating and supporting [OpenTelemetry](https://opentelemetry.io/), the open standard for metrics, traces and logs. In particular, it focuses on the integration between [Sentry's performance monitoring product](https://docs.sentry.io/product/performance/) and [OpenTelemetry's tracing spec](https://opentelemetry.io/docs/concepts/signals/traces/).
+
+## Background
+
+When Sentry performance monitoring was initially introduced, OpenTelemetry was in early stages. This lead to us adopt a slightly different model from OpenTelemetry, notably we have this concept of transactions that OpenTelemetry does not have. We've described this, and some more historical background, in our [performance monitoring research document](../research/performance/index.mdx).
+
+TODO: Add history about OpenTelemetry Sentry Exporter: https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/exporter/sentryexporter
+
+## Approach
+
+TODO: Talk about the approach we are using, based on Matt's hackweek project - https://github.com/getsentry/sentry-ruby/pull/1876
+
+## Protocol
+
+Below describe the transformations between an OpenTelemetry span and a Sentry Span. Related: [the interface for a Sentry Span](https://develop.sentry.dev/sdk/event-payloads/span/) and for an [OpenTelemetry span](https://github.com/open-telemetry/opentelemetry-proto/blob/724e427879e3d2bae2edc0218fff06e37b9eb46e/opentelemetry/proto/trace/v1/trace.proto#L80-L256).
+
+
+
+## SDK Spec
+
+- SpanProcessor: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/sdk.md#span-processor
+- Propogator: https://opentelemetry.io/docs/reference/specification/context/api-propagators/
+