feat: `Value::some`, `::none`, and `SumType::new_option` helpers (#1828) #3143

Job	Run time
Check for changes in Python files	8s
Build HUGR binary	56s
check python 3.10	16s
Check serialization schema	9s
check python 3.13	28s
test python 3.10	33s
test python 3.13	26s
Required checks 🐍	1s
	2m 57s

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