Implement dedicated SDK

[danielbui12]

storage-client

• Complete TODO functions
• Implement query/extrinsics call in rust SDK
• Add integration tests
• Add more examples if needed
• Chores: lint, NatSpec, ...

file-system-client

• Complete TODO functions
• Implement query/extrinsics call in rust SDK
• Add integration tests
• Add more examples if needed
• Chores: lint, NatSpec, ...

s3-client

• Complete TODO functions
• Implement query/extrinsics call in rust SDK
• Add integration tests
• Add more examples if needed
• Chores: lint, NatSpec, ...

[bkontur]

#64 (comment)