CHANGE(CodeAnalyzer): @W-15246377@: Add announcement showing users how to install v4.x beta (#1416)

Author: stephen-carter-at-sf

messages/common.md

@@ -8,4 +8,8 @@ Emit additional command output to stdout.
 
 # surveyRequestMessage
 
-We're continually improving Salesforce Code Analyzer. Tell us what you think! Give feedback at https://research.net/r/SalesforceCA
+We're continually improving Salesforce Code Analyzer. Tell us what you think! Give feedback at https://research.net/r/SalesforceCA
+
+# upgradeTo4xRecommendation
+
+To use the most up-to-date Code Analyzer features including PMD 7.x, install Code Analyzer v4.x (Beta). To install v4.x (beta), run this command: sf plugins install @salesforce/sfdx-scanner@latest-beta

src/lib/ScannerCommand.ts

@@ -40,6 +40,7 @@ export abstract class ScannerCommand extends SfCommand<AnyJson> implements Displ
 		const logger: Logger = await Logger.child(this.ctor.name);
 		const display: Display = new UxDisplay(this, this.spinner, inputs.verbose as boolean);
 
+		display.displayWarning(getMessage(BundleName.Common, 'upgradeTo4xRecommendation'));
 		display.displayWarning(getMessage(BundleName.Common, 'surveyRequestMessage'));
 		this.buildEventListeners(display);