Updated Powershell options to fully have defaults (#15234)

## DESCRIBE YOUR PR
Made sure all eligible options for defaults had them. 


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## PRE-MERGE CHECKLIST

*Make sure you've checked the following before merging your changes:*

- [ ] Checked Vercel preview for correctness, including links
- [ ] PR was reviewed and approved by any necessary SMEs (subject matter
experts)
- [ ] PR was reviewed and approved by a member of the [Sentry docs
team](https://github.com/orgs/getsentry/teams/docs)

Co-authored-by: Shannon Anahata <[email protected]>

Author: sfanahata

docs/platforms/powershell/configuration/options.mdx

@@ -36,7 +36,7 @@ Turns debug mode on or off. If debug is enabled SDK will attempt to print out us
 
 </SdkOption>
 
-<SdkOption name="DiagnosticLevel" type="enum">
+<SdkOption name="DiagnosticLevel" type="enum" defaultValue="debug">
 
 Enabling `debug` mode makes the SDK generate as much diagnostic data as possible. However, if you'd prefer to lower the verbosity of the Sentry SDK diagnostics logs, configure this option to set the appropriate level:
 
@@ -88,7 +88,7 @@ The maximum number of [envelopes](https://develop.sentry.dev/sdk/data-model/enve
 
 </SdkOption>
 
-<SdkOption name="AttachStacktrace" type="bool">
+<SdkOption name="AttachStacktrace" type="bool" defaultValue="true">
 
 When enabled, stack traces are automatically attached to all messages logged. Stack traces are always attached to exceptions; however, when this option is set, stack traces are also sent with messages. This option, for instance, means that stack traces appear next to all log messages.
 
@@ -105,14 +105,11 @@ If this flag is enabled, certain personally identifiable information (PII) is ad
 If you are using Sentry in your mobile app, read our [frequently asked questions about mobile data privacy](/security-legal-pii/security/mobile-privacy/) to assist with Apple App Store and Google Play app privacy details.
 
 </Alert>
-
-This option is turned off by default.
-
 If you enable this option, be sure to manually remove what you don't want to send using our features for managing [_Sensitive Data_](../../data-management/sensitive-data/).
 
 </SdkOption>
 
-<SdkOption name="SendClientReports" type="bool">
+<SdkOption name="SendClientReports" type="bool" defaultValue="true">
 
 Set this boolean to `false` to disable sending of client reports. Client reports are a protocol feature that let clients send status reports about themselves to Sentry. They are currently mainly used to emit outcomes for events that were never sent.
 
@@ -163,7 +160,7 @@ Controls how many seconds to wait before shutting down. Sentry SDKs send events
 
 ## Tracing Options
 
-<SdkOption name="TracesSampleRate" type="float">
+<SdkOption name="TracesSampleRate" type="float" defaultValue="null">
 
 A number between `0` and `1`, controlling the percentage chance a given transaction will be sent to Sentry. (`0` represents 0% while `1` represents 100%.) Applies equally to all transactions created in the app. Either this or <PlatformIdentifier name="TracesSampler" /> must be defined to enable tracing.