[SPIKE] Try to parse H.264 specification with RAG approach

[varsill]

The idea is to do research concerning usage of LLM-aided approaches like Retrieval-Augmented Generation (RAG) to parse H.264 specification, especially H.264 bitstream syntax (section 7.3) and the bitstream fields semantics (section 7.4).

In the final run it would be good to have all the "direct bitstream fields" (these written in snake_case in H.264 spec notation) listed, along with the following information:

• field type
• if given field is always available in the stream or if it's only available conditionally (hidden behind some if-statement or in a loop)
• default value of the field if the stream is not available in the stream

as well as all the "derived fields" (these written in PascalCase in the H.264 spec notation) along with the procedure to derive them based on different "derived fields" and "direct bitstream fields".