Feat: expose TVLs fetched via lib as part of api endpoints

[bvotteler]

Resolves #1596

Interbtc UI Pull Request Template

Description

Main changes:

• Adding endpoints to query for AMM and lending TVLs. To be used by DefiLlama et al.
• Bump interbtc-api dependency to version 2.6.0
• Updated interbtc-api import paths; now be properly exposed in latest lib version

New API endpoints

• /api/tvl_dex, and
• /api/tvl_loans

Both return an array of currencies, amounts and atomic amounts in that currency, and the equivalent USD amount using coingecko prices.

Example data

response for a GET request to api/tvl_loans:

[
   {
      "currency":{
         "name":"Bitcoin",
         "decimals":8,
         "humanDecimals":8,
         "ticker":"IBTC"
      },
      "coingeckoId":"bitcoin",
      "atomicAmount":"1099026075",
      "amount":"10.99026075",
      "amountUsd":"420981.93"
   },
   {
      "currency":{
         "foreignAsset":{
            "id":2,
            "coingeckoId":"tether"
         },
         "name":"Tether USD",
         "ticker":"USDT",
         "decimals":6
      },
      "coingeckoId":"tether",
      "atomicAmount":"316375634035",
      "amount":"316375.634035",
      "amountUsd":"316692"
   },
   {
      "currency":{
         "name":"Polkadot",
         "decimals":10,
         "humanDecimals":5,
         "ticker":"DOT"
      },
      "coingeckoId":"polkadot",
      "atomicAmount":"453203445347255",
      "amount":"45320.3445347255",
      "amountUsd":"242010.63"
   },
   {
      "currency":{
         "foreignAsset":{
            "id":3,
            "coingeckoId":""
         },
         "name":"Voucher DOT",
         "ticker":"VDOT",
         "decimals":10
      },
      "coingeckoId":"voucher-dot",
      "atomicAmount":"392067334256991",
      "amount":"39206.7334256991",
      "amountUsd":"250923.09"
   }
]

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[github-actions]

Running Lighthouse audit...

[tomjeatt]

Looks great