fix: Disable strict filename validation for default schema

[mmarseu]

By default, validation against the default schema is now more lenient with filenames. Warnings are generated for any filename that doesn't match either bom.json or *.cdx.json.

Custom filename pattern validation is not affected and remains an error.

[github-actions]

Coverage Report •

File	Stmts	Miss	Cover	Missing
__main__.py	311	15	95%	205–206, 223, 627–628, 632–637, 639, 642, 654–655
validator
helper.py	48	0	100%
validate.py	79	4	94%	39, 87, 103, 138
TOTAL	1597	66	95%

Tests	Skipped	Failures	Errors	Time
283	2 💤	0 ❌	0 🔥	4.509s ⏱️

[italvi]

@mmarseu Just some small comments, I think the most critical one is the no-filename being ambiguous.

[italvi]

@mmarseu I'm fine with the changes, still seems odd that the SBOM is completely compliant, even though you get a warning:

But I am fine with it, as the "vanilla" CycloneDX only recommends a naming convention.