Implement get_project_stats API end point

[shrnkld]

Important:
The data fields currently returned by this initial version of get_project_stats will change to match the definitions here: https://api.blocknet.co/#get-project-stats

Here is a sample response:

{
  "error": 0,
  "result": {
    "api_call_cost_aablock": "1.86627",
    "api_call_cost_ablock": "21.875",
    "api_call_cost_eth": "0.020989",
    "api_call_cost_sysblock": "173.773455",
    "api_call_cost_wsys": "201.573425",
    "amount_aablock": "1.86627",
    "amount_ablock": "0.0",
    "amount_eth": "0.0",
    "amount_sysblock": "0.0",
    "amount_wsys": "0.0",
    "api_key": "ng-qQKiKT2T5FGY5Ba_P9Cb3I-fj_ZC04slMbijnmeQ",
    "api_tokens": "6000000",
    "api_tokens_remaining": "6000000",
    "api_tokens_used": "0",
    "avax_address": "0x6b3757aA176F594B1bB7806Fea9A4Ec6E4fA5808",
    "eth_address": "0x22fea657760Bbae0c0b76e46ff0e7821A01BE8Ef",
    "expiry_time": "2022-08-17 19:27:21 UTC",
    "nevm_address": "0x9118e4076E1878Aaf84CbD7EcA78cE3cfa98b80C",
    "project_id": "244c7f0c-d845-44f5-af9a-c572bdd023d9",
    "project_type": "XQuery", 
    "start_time": "2022-08-17 18:27:21 UTC",
    "status": "active",
    "tier": 0
  }
}

To do:

• implement the get_project_stats API end point to enable the dashboard to display the data returned for a specific project (via the view project info button)