doc: Link to the repository and official docs in doc.go (#623)

doc.go

@@ -1,64 +1,6 @@
 /*
-Package sentry is the official Sentry SDK for Go.
+Package repository: https://github.com/getsentry/sentry-go/
 
-Use it to report errors and track application performance through distributed
-tracing.
-
-For more information about Sentry and SDK features please have a look at the
-documentation site https://docs.sentry.io/platforms/go/.
-
-# Basic Usage
-
-The first step is to initialize the SDK, providing at a minimum the DSN of your
-Sentry project. This step is accomplished through a call to sentry.Init.
-
-	func main() {
-		err := sentry.Init(...)
-		...
-	}
-
-A more detailed yet simple example is available at
-https://github.com/getsentry/sentry-go/blob/master/_examples/basic/main.go.
-
-# Error Reporting
-
-The Capture* functions report messages and errors to Sentry.
-
-	sentry.CaptureMessage(...)
-	sentry.CaptureException(...)
-	sentry.CaptureEvent(...)
-
-Use similarly named functions in the Hub for concurrent programs like web
-servers.
-
-# Performance Monitoring
-
-You can use Sentry to monitor your application's performance. More information
-on the product page https://docs.sentry.io/product/performance/.
-
-The StartSpan function creates new spans.
-
-	span := sentry.StartSpan(ctx, "operation")
-	...
-	span.Finish()
-
-# Integrations
-
-The SDK has support for several Go frameworks, available as subpackages.
-
-# Getting Support
-
-For paid Sentry.io accounts, head out to https://sentry.io/support.
-
-For all users, support channels include:
-
-	Forum: https://forum.sentry.io
-	Discord: https://discord.gg/Ww9hbqr (#go channel)
-
-If you found an issue with the SDK, please report through
-https://github.com/getsentry/sentry-go/issues/new/choose.
-
-For responsibly disclosing a security issue, please follow the steps in
-https://sentry.io/security/#vulnerability-disclosure.
+For more information about Sentry and SDK features, please have a look at the official documentation site: https://docs.sentry.io/platforms/go/
 */
 package sentry