chore: add sonar badges to readme (#59)

README.md

@@ -1,3 +1,14 @@
+[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer)
+[![Bugs](https://sonarcloud.io/api/project_badges/measure?project=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer&metric=bugs)](https://sonarcloud.io/summary/new_code?id=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer)
+[![Code Smells](https://sonarcloud.io/api/project_badges/measure?project=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer&metric=code_smells)](https://sonarcloud.io/summary/new_code?id=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer)
+[![Coverage](https://sonarcloud.io/api/project_badges/measure?project=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer&metric=coverage)](https://sonarcloud.io/summary/new_code?id=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer)
+[![Duplicated Lines (%)](https://sonarcloud.io/api/project_badges/measure?project=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer&metric=duplicated_lines_density)](https://sonarcloud.io/summary/new_code?id=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer)
+[![Lines of Code](https://sonarcloud.io/api/project_badges/measure?project=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer&metric=ncloc)](https://sonarcloud.io/summary/new_code?id=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer)
+[![Reliability Rating](https://sonarcloud.io/api/project_badges/measure?project=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer&metric=reliability_rating)](https://sonarcloud.io/summary/new_code?id=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer)
+[![Security Rating](https://sonarcloud.io/api/project_badges/measure?project=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer&metric=security_rating)](https://sonarcloud.io/summary/new_code?id=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer)
+[![Maintainability Rating](https://sonarcloud.io/api/project_badges/measure?project=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer&metric=sqale_rating)](https://sonarcloud.io/summary/new_code?id=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer)
+[![Vulnerabilities](https://sonarcloud.io/api/project_badges/measure?project=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer&metric=vulnerabilities)](https://sonarcloud.io/summary/new_code?id=SchweizerischeBundesbahnen_ch.sbb.polarion.extension.excel-importer)
+
 # Polarion ALM extension to process WorkItems by uploading xlsx-files
 
 This Polarion extension provides possibility to update (or create) WorkItems using xlsx-file.