Add Dynamic Metrics to the Landing page, Payments page, Requests page

[MantisClone]

Motivation

We believe users would appreciate more dynamic metrics instead of static hard-coded ones.

Definition of Done

• Landing page: All time # of Requests, Last month # of Requests, All time # of Payments, Last month # of Payments
• Requests page: All time # of Requests, Last year # of Requests, Last month # of Requests, Last week # of Requests
• Payments page: All time # of Payments, Last year # of Payments, Last month # of Payments, Last week # of payments

Requires

• Add summary counters to the storage subgraph storage-subgraph#11
• Add summary counters to the payments subgraph payments-subgraph#103