Expand `InputType` with new variant: Bolt12 offer #3786

Job	Run time
Test sdk-bindings	2m 45s
Test sdk-cli	1m 9s
Test sdk-core	1m 23s
Test sdk-common	1m 5s
Check SDK as Rust dependency in fresh project	2m 34s
Clippy	51s
Check flutter	2m 44s
Check react native	1m 8s
Format	9s
	13m 48s

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