URI encode FileResource urls

[amvanbaren]

Fixes #426
Contributes to #432

Validation steps:

• to reproduce the error, use master branch. to test the fix use this branch
• open the branch in gitpod
• wait until publisher terminal is done executing its task
• use publisher terminal to execute the following commands:
  • create namespace:

  curl --location --request POST 'http://localhost:8080/api/-/namespace/create?token=super_token' \
  --header 'Content-Type: application/json' \
  --data-raw '{"name":"abelfubu"}'
  

  • download vsix package:

  curl --location --request GET 'https://open-vsx.org/api/abelfubu/abelfubu-dark/1.3.4/file/abelfubu.abelfubu-dark-1.3.4.vsix' \
  --output 'abelfubu.abelfubu-dark-1.3.4.vsix'
  

  • publish vsix package:

  curl --location --request POST 'http://localhost:8080/api/-/publish?token=super_token' \
  --header 'Content-Type: application/octet-stream' \
  --data-binary '@/workspace/openvsx/abelfubu.abelfubu-dark-1.3.4.vsix'
  

• switch to server terminal and stop the server
• using psql:

UPDATE file_resource SET storage_type = 'azure-blob';

• open /workspace/openvsx/server/src/dev/resources/application-ovsx.properties and add:

ovsx.storage.azure.service-endpoint=https://openvsxorg.blob.core.windows.net/
ovsx.storage.azure.blob-container=resources

• in server terminal run:

./gradlew runServer

• switch back to publisher terminal and get color-theme.json:

curl --location --request GET 'http://localhost:8080/vscode/asset/abelfubu/abelfubu-dark/1.3.4/Microsoft.VisualStudio.Code.WebResources/extension/themes/abelFubu%20Dark+-color-theme.json'

[filiptronicek]

@amvanbaren thanks for the very easy-to-follow validation steps! I tried all of them on both master and this PR and it looks like everything is working as expected.

LGTM! ✅