siplasplas feature/type-erasure branch documentation

• siplasplas-logger module
• siplasplas-utility module
• siplasplas-variant module
• siplasplas-allocator module
• siplasplas-metatype module
• siplasplas-typeerasure module
• siplasplas-reflection-common module
• siplasplas-reflection-static module
• siplasplas-reflection-dynamic module
• siplasplas-signals module
• siplasplas-fswatch module
• siplasplas-cmake module