When creating a scratch, assembler error line numbers do not match the input asm

[bates64]

This is probably due to ASM_PRELUDE - we either need something akin to #line in C or to parse the error messages and change the line numbers. The latter may be more brittle but would allow us to show errors inline in the asm textbox.

[ethteck]

discussion here: https://discord.com/channels/897066363951128586/897066363951128590/911713302734864455

[simonlindholm]

I wonder if we can use .include or similar compiler flag to include the prelude