Add standalone .asm BOM-extraction scripts and format documentation

Reverse-engineered the Creo .asm binary format enough to extract referenced
component codes via a text heuristic, mirroring AssemblyComponentScanner's
approach and Form1's recursive resolution against cad_index.db. Documents
known false-positive classes (ModelView# view IDs, self-references, and
phantom references to superseded/renamed codes).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.gitignore

@@ -33,3 +33,6 @@ publish/
 # Report BOM generati manualmente da Creo per debug/validazione: mai una dipendenza
 # della pipeline (che deve funzionare senza Creo), solo un aiuto occasionale.
 *.bom.*
+
+# Output di scripts/ExtractCreoStrings.cs
+/BOM.txt