Expand `InputType` with new variant: Bolt12 offer #3798

Job	Run time
Test sdk-bindings	2m 26s
Test sdk-cli	1m 11s
Test sdk-common	39s
Test sdk-core	1m 13s
Check SDK as Rust dependency in fresh project	2m 36s
Clippy	1m 10s
Check flutter	3m 11s
Format	5s
Check react native	1m 41s
	14m 12s

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