Add RemoteInput.open without cache

[tikkss]

GitHub: GH-5

This patch will introduce the new high level API for IO like object (input only object, read only object).

RemoteInput.open downloads the data lazily on the first read. The data is stored in a system temporary directory and removed on close:

RemoteInput.open("https://example.com/sample/data.csv") do |input|
  input.read
end

RemoteInput#local_path returns a temporary file path:

RemoteInput.open("https://example.com/sample/data.csv") do |input|
  input.local_path
  # => /system temporary directory/red-remote-input/1234-567/data
  # 1234 is the process ID
  # 567 is the object ID
  # data is the fixed file name
end

Without a block, RemoteInput.open returns a RemoteInput object that must be closed explicitly:

input = RemoteInput.open("https://example.com/sample/data.csv")
input.read
input.close

[tikkss]

GitHub Actions was disabled when I opened this PR, so no workflows ran.
I've since enabled it, but since events aren't re-delivered, I'll close and reopen this PR to trigger CI.