Support for Oracle APEX

Hi, I was using bruno API client for my Oracle APEX project and saw that it uses httpsnippet to generate code snippets. I wish you could also support Oracle APEX. It has an API that does HTTP requests. I can also help with development if needed. Thanks.

Start by reviewing how httpsnippet generates snippets for existing targets and how Oracle APEX's HTTP API should be represented. Define the expected Oracle APEX output and add coverage for it; the issue names no files or tests, so repository exploration is required.

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