test: remove stdout and std from test by mocking logger module (#161)

- Same as #143 
- Resolves
https://github.com/stats-organization/github-stats-extended/pull/143#discussion_r3105155487
- Closes #141

packages/core/src/common/log.js

@@ -1,9 +0,0 @@
-// @ts-check
-/**
- * Return console instance based on the environment.
- *
- * @type {Console | {log: () => void, error: () => void}}
- */
-const logger = console;
-
-export { logger };

packages/core/src/common/log.ts

@@ -0,0 +1,12 @@
+/**
+ * Return console instance based on the environment.
+ */
+const logger: {
+  log: (...args: Array<unknown>) => void;
+  error: (...args: Array<unknown>) => void;
+} = {
+  log: console.log,
+  error: console.error,
+};
+
+export { logger };