Implements jest-junit report parsing

src/parsers/test-parser.ts

@@ -0,0 +1,10 @@
+import {Endpoints} from '@octokit/types'
+
+type OutputParameters = Endpoints['POST /repos/:owner/:repo/check-runs']['parameters']['output']
+
+export type ParseTestResult = (content: string) => Promise<TestResult>
+
+export interface TestResult {
+  success: boolean
+  output: OutputParameters
+}