pdfReport/generate: add --debug flag

[sorja]

Example:

# Normal
$ ts-node src/tools/report/generate.ts 

14:23:27 info: ========== ******** Starting 1741177407906
14:24:07 info: ========== ******** Executed 1741177447067 elapsed 39.161s

# With debug
$ ts-node src/tools/report/generate.ts  --debug

14:24:24 info: ========== ******** Starting 1741177464101
14:24:53 debug: Browser window opened. Press Enter to generate PDF and close the browser...

14:25:03 info: ========== ******** Executed 1741177503861 elapsed 39.76s