feat: add configuration api route

[matthisholleville]

Closes #449

📑 Description

Initialize the configuration API route and add cache support

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed

ℹ Additional Information

Examples :

AddCache :

grpcurl -plaintext -d '{
  "cache": {
    "region": "us-west-1",
    "bucketName": "my-cache-bucket"
  }
}' localhost:8080 schema.v1.Server/AddConfig

{
  "status": "Configuration updated."
}

RemoveCache :

grpcurl -plaintext -d '{
  "cache": {
    "bucketName": "my-cache-bucket"
  }
}' localhost:8080 schema.v1.Server/RemoveConfig

{
  "status": "Successfully removed the remote cache"
}

[AlexsJones]

k8sgpt on  feat/init-cache-api [$] via 🐹 v1.20.4 on ☁️  (eu-west-1)
❯ grpcurl -plaintext -d '{
  "cache": {
    "bucketName": "foobark8sgpt1"
  }
}' localhost:8080 schema.v1.Server/RemoveConfig

Error invoking method "schema.v1.Server/RemoveConfig": target server does not expose service "schema.v1.Server"

@matthisholleville I tried this by checking your PR out, anything I am doing wrong here?

[matthisholleville]

Try this @AlexsJones :

grpcurl -plaintext -d '{
  "cache": {
    "bucketName": "foobark8sgpt1"
  }
}' localhost:8080 schema.v1.ServerService/RemoveConfig

---

grpcurl -plaintext -d '{
  "cache": {
    "region": "us-west-1",
    "bucketName": "my-cache-bucket"
  }
}' localhost:8080 schema.v1.ServerService/AddConfig