chore(cursor): Add rules for fetching develop docs (#19377)

Adds some rules (not enabled by default) for fetching the develop docs
(in markdown format) in case they are needed.

I added the develop docs that contain mostly prose text and are not too
focused on the technical details (as this info can be retrieved from the
code itself).


Closes #19378 (added automatically)

Author: s1gr1d

.cursor/rules/fetch-docs/attributes.mdc

@@ -0,0 +1,6 @@
+---
+description: Use this rule if you need developer documentation about Span Attributes within the Sentry SDKs
+alwaysApply: false
+---
+
+Find the SDK developer documentation here: https://develop.sentry.dev/sdk/telemetry/attributes.md

.cursor/rules/fetch-docs/bundle-size.mdc

@@ -0,0 +1,6 @@
+---
+description: Use this rule if you need developer documentation about bundle size in the Sentry SDKs for browser environments.
+alwaysApply: false
+---
+
+Find the SDK developer documentation here: https://develop.sentry.dev/sdk/platform-specifics/javascript-sdks/bundle-size.md

.cursor/rules/fetch-docs/scopes.mdc

@@ -0,0 +1,6 @@
+---
+description: Use this rule if you need developer documentation about the concept of Scopes (global, isolation, current) within the Sentry SDKs
+alwaysApply: false
+---
+
+Find the SDK developer documentation here: https://develop.sentry.dev/sdk/telemetry/scopes.md

.cursor/rules/fetch-docs/tracing-in-browser.mdc

@@ -0,0 +1,6 @@
+---
+description: Use this rule if you need developer documentation about tracing for browser environments (e.g. page-load/navigation spans and Web Vitals).
+alwaysApply: false
+---
+
+Find the SDK developer documentation here: https://develop.sentry.dev/sdk/platform-specifics/javascript-sdks/browser-tracing.md