feat: added s3 file service to be init from default config

[Danushka96]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 39.68254% with 38 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
s3_file_service.go	0.00%	28 Missing ⚠️
dynamodb_repository.go	69.69%	8 Missing and 2 partials ⚠️

Files with missing lines	Coverage Δ
dynamo_config.go	100.00% <100.00%> (ø)
dynamodb_repository.go	69.36% <69.69%> (ø)
s3_file_service.go	0.00% <0.00%> (ø)

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