test: add chrome object to globals

[yudukikun5120]

Resolved a problem with the chrome object causing a reference error when running the test suite with Jest.

❯ npx jest      
 FAIL  src/methods/ReportTemplateGenerator.test.ts
  ● Test suite failed to run

    ReferenceError: chrome is not defined

      111 | \\begin{document}
      112 | \\title{{{course-name}}\\\\{{report-title}}}
    > 113 | \\author{{{student-name}}\\\\${chrome.i18n.getMessage(
          |                                ^
      114 |     "report_template_student_code"
      115 |   )}}
      116 | \\lstset{

      at Object.chrome (src/methods/ReportTemplateGenerator.tsx:113:32)
      at Object.<anonymous> (src/methods/ReportTemplateGenerator.test.ts:5:34)

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