Split boilerplate generation into separate files per frame format

[Copilot]

Boilerplate generation now creates individual files for each frame format instead of a single monolithic file, plus a base file with common utilities and an index file for easy importing.

Generated File Structure

Language	Base	Individual Formats	Index
Python	frame_base.py	basic_frame.py, tiny_frame.py, ...	__init__.py
TypeScript	frame_base.ts	BasicFrame.ts, TinyFrame.ts, ...	index.ts
JavaScript	frame_base.js	BasicFrame.js, TinyFrame.js, ...	index.js
C	frame_base.h	basic_frame.h, tiny_frame.h, ...	frame_parsers.h
C++	frame_base.hpp	BasicFrame.hpp, TinyFrame.hpp, ...	frame_parsers.hpp

Usage

# Import specific frame formats
from my_package import BasicFrame, TinyFrame

# Or import everything via index
from my_package import *

// Include all formats
#include "frame_parsers.h"

// Or include specific format
#include "basic_frame.h"

Changes

• Frame parser generators: Added generate_*_multi() functions returning {filename: content} dicts
• generate_boilerplate.py: Uses multi-file generation by default via multi_file=True parameter
• generate.py: Copies entire boilerplate directories instead of specific files
• Tests: Updated includes from frame_parsers_gen.h → frame_parsers.h

Original prompt

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This section details on the original issue you should resolve

<issue_title>Boilerplate generation should create more files</issue_title>
<issue_description>Boilerplate file generation should create a new file for each frame format. There should also be a base file for each language that has common functions.
There should also be a file the allows each frame format to be imported in.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Boilerplate generation should create more files #64

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