Validate imported GLTFs.

[AN-DCL]

After user clicks on red "Import" button, GLTF is validated by a function provided by Babylon.
File size check is included into validation procedure.
Red border around file name is displayed only when the name is incorrect.
The red cross button which removes an asset is deliberately made always visible.
Closes decentraland/sdk#765

[github-actions]

Test this pull request

• The @dcl/sdk package can be tested in scenes by running

  npm install "https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/gltf-validation-signed/dcl-sdk-7.1.16-5060506018.commit-b078534.tgz"

• To test with npx init

  export SDK_COMMANDS="https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/gltf-validation-signed/dcl-sdk-commands-7.1.16-5060506018.commit-b078534.tgz"
  npx $SDK_COMMANDS init

• The @dcl/inspector package can be tested by visiting this url

  • Or by installing it via NPM

  npm install "https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/gltf-validation-signed/@dcl/inspector/dcl-inspector-7.1.16-5060506018.commit-b078534.tgz"

• The /changerealm command to test test in-world

  /changerealm https://sdk-team-cdn.decentraland.org/ipfs/gltf-validation-signed-e2e
  

• You can preview this build entering:
  https://playground.decentraland.org/?sdk-branch=gltf-validation-signed

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (c718b1c) 72.02% compared to head (dd03666) 72.02%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #598   +/-   ##
=======================================
  Coverage   72.02%   72.02%           
=======================================
  Files         254      254           
  Lines        8648     8648           
  Branches     1113     1113           
=======================================
  Hits         6229     6229           
  Misses       2310     2310           
  Partials      109      109           

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