Implementation of structure macros for DAMS.

The original is here: https://wilsonminesco.com/StructureMacros/

Differences

The original macros was written for Cross-32 assembly, but this varian is targeted to DASM. Because of DASM limitations and features macros implementation is different and here is a list of them:

• in begin while repeat I use REPEAT_, because the repeat is a reserved word in DASM
• in case there is no limitation of cases number, you can have as many, as you want
• case macro can be nested
• for ... next macro can be nested
• in for ... next macro there is no need to specify a variable at the end like NEXT var1, just NEXT will be enough

The project structure

The macros files are in "lib" folder. The "test" folder as it's obvious for tests. Each macro is present in tests in two forms: how it can be used in "test/with" and how the same code can be written in pure assembly in "test/without". Both versions (eg. test/with/if_eq.asm and test/without/if_eq.asm) assembles in the same binary outputs.