Fix memoryinfo parser to handle decorator log format with colon separator

[Copilot]

The RE_MEM_INFO_START regex in memoryinfo.py only matched logs with space separators (*** Memory info name ***), failing on decorator formats using colons (*** Memory info: name ***).

Changes

Updated regex pattern (src/micropython_magic/memoryinfo.py:32)

• Pattern now handles optional colon with flexible whitespace: \s*:?\s*
• Uses [^*]* capture group (names cannot contain asterisks)
• Trims leading/trailing whitespace from captured names

# Before
RE_MEM_INFO_START = re.compile(r"\*\*\* Memory info (.*) \*\*\*")

# After  
RE_MEM_INFO_START = re.compile(r"\*\*\* Memory info\s*:?\s*([^*]*?)\s*\*\*\*")

Test coverage (tests/test_memoryinfo_parser.py)

• 19 parametrized test cases covering format variations
• 4 integration tests for full log parsing with mixed formats
• Validates backward compatibility with existing standard format

Supported formats

"*** Memory info test ***"           # Standard (space)
"*** Memory info: test ***"          # Decorator (colon + space)  
"*** Memory info:test ***"           # Decorator (no space)
"*** Memory info : test ***"         # Space before colon
"*** Memory info  test ***"          # Multiple spaces

Original prompt

On setup_meminfologger.ipynb, The log format used bij this decorator is not properly parsed bij the parser in https://github.com/Josverl/micropython-magic/blob/mpremoteboard/src%2Fmicropython_magic%2Fmemoryinfo.py

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