Additional endpoint to return simple dapps list

[bobo-k2]

Created additional endpoint /api/v1/:network/dapps-staking/dappssimple to provide simplified list of daps with just mandatory properties. This optiomization will improve the portal performance and resolve problems with Token API handling large volume of data.

[github-actions]

Visit the preview URL for this PR (updated for commit caff6e0):

https://astar-token-api--pr107-feat-dapps-small-mod-mvyrqenr.web.app

_{(expires Sat, 09 Sep 2023 12:27:53 GMT)}

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[gluneau]

LGTM & Works.

curl 'http://127.0.0.1:5001/astar-token-api/us-central1/app/api/v1/astar/dapps-staking/dappssimple' | json_pp
...
[
   {
      "address" : "0x569b344ad6bf087a285f0d415d0066028921d873",
      "iconUrl" : "https://storage.googleapis.com/astarnetwork-a4924.appspot.com/astar-dapps%2F0x569b344ad6bf087a285f0d415d0066028921d873_icon-dark.b67724cc.svg",
      "mainCategory" : "defi",
      "name" : "ACryptoS"
   },
   {
      "address" : "0x1de7c3A07918fb4BE9159703e73D6e0b0736CaBC",
      "iconUrl" : "https://firebasestorage.googleapis.com/v0/b/astarnetwork-a4924.appspot.com/o/astar-dapps%2F0x1de7c3A07918fb4BE9159703e73D6e0b0736CaBC_rIb1fUz3_400x400%20(1).jpeg?alt=media&token=3832d94b-81bd-4e12-9d8b-96d83896ed3a",
      "mainCategory" : "tooling",
      "name" : "ADAO"
   },
   {
      "address" : "0x862e9ed0e5643dceb579fc31d59c6113ce2790d7",
      "iconUrl" : "https://storage.googleapis.com/astarnetwork-a4924.appspot.com/astar-dapps%2F0x862e9ed0e5643dceb579fc31d59c6113ce2790d7_Sygnet_B%20(2).png",
      "mainCategory" : "defi",
      "name" : "AI DEX AGGREGATOR"
   },
   {
      "address" : "0x22e1aa6bafb9965523cc33a5bfd2e4d3326a23e4",
      "iconUrl" : "https://storage.googleapis.com/astarnetwork-a4924.appspot.com/astar-dapps%2F0x22e1aa6bafb9965523cc33a5bfd2e4d3326a23e4_airlyft-logo-circle-high-res.png",
      "mainCategory" : "utility",
      "name" : "AirLyft.One"
   }
...