Refactored pacakge structure for cleaner project structure

See merge request idatt2106-v23-03/backend!238

Javadoc

See merge request idatt2106-v23-03/backend!237

test for recipeService

See merge request idatt2106-v23-03/backend!236

entity tests

See merge request idatt2106-v23-03/backend!235

Added TokenService unit tests

Closes #282

See merge request idatt2106-v23-03/backend!234

Resolve "Request DTO tests"

Closes #283

See merge request idatt2106-v23-03/backend!233

Added WasteService unit tests

Closes #279

See merge request idatt2106-v23-03/backend!232

Resolve "More Group controller tests"

Closes #281

See merge request idatt2106-v23-03/backend!231

Resolve "Response dto tests"

Closes #280

See merge request idatt2106-v23-03/backend!230

RecipeController unit test coverage has been improved slightly

Closes #278

See merge request idatt2106-v23-03/backend!229

Resolve "fix authorites of group members"

Closes #275

See merge request idatt2106-v23-03/backend!225

Removed non-needed input validation from FridgeService add product method

Closes #277

See merge request idatt2106-v23-03/backend!228

added lowercase

See merge request idatt2106-v23-03/backend!227

Added more unit tests for ProductController

Closes #276

See merge request idatt2106-v23-03/backend!226

Resolve "Authentication on waste endpoints + tests"

Closes #272

See merge request idatt2106-v23-03/backend!223

Added more UserController user tests

Closes #273

See merge request idatt2106-v23-03/backend!224

added test for update product in fridge and wast product in fridge

See merge request idatt2106-v23-03/backend!222