Converting src/controllers/mods.js from JS to TS for Issue #32

[lexarr]

Resolves #32

Changes

• Translated imports (const -> import)
• Added import for Request/Response from express
• Added BBRequest interface due to Request object errors
• Fixed initial translation errors such as typing of variables related to functions for specific types (added as as necessary)
• Added an await to an async function
• Suppressed linting errors due to untranslated JS files

Testing

• Ran npm run lint (run ESLint)
  • No longer receiving errors for src/controllers/mods.ts
• Ran npm run test (run the tests defined in tests)
  • Continues to pass tests
• Ran ./nodebb start (runs project)
  • Continues to run without error

[coveralls]

Pull Request Test Coverage Report for Build 7719829126

• -15 of 90 (83.33%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.001%) to 85.092%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/controllers/mods.js	75	90	83.33%
<!--	Total:	75	90	83.33%	-->

Files with Coverage Reduction	New Missed Lines	%
src/controllers/mods.js	1	72.25%
<!--	Total:	1		-->

Totals
Change from base Build 7649102120:	-0.001%
Covered Lines:	22633
Relevant Lines:	25361

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💛 - Coveralls