Fix build under GCC 15: include <cstdint>, pin C standard

[krixkrix]

Summary

develop does not compile with GCC 15:

• Missing <cstdint>: GCC 15's libstdc++ no longer pulls in <cstdint> transitively through <memory>, <string> and similar headers. Every header that uses uint32_t/uint64_t without including it fails, for example common_exportstream.hpp:44: error: 'uint64_t' has not been declared.
• C23 default: GCC 15 defaults to C23, where bool is a keyword. That breaks the vendored libzip's typedef ... bool in zipint.h.

Fix:

• #include <cstdint> in the 76 headers under Implementation/ and the 10 driver headers that rely on the transitive include (ADS, A3200, BuR journal group/value, CifX, Euler, Marlin serial controller, Pylon, Rasterizer algorithm, RayLase).
• set (CMAKE_C_STANDARD 17) in CMakeLists.txt.

There are no functional changes. Older compilers are unaffected: <cstdint> is standard C++11, and the C code already targets C17 or earlier.

Evidence

GCC 15.2.0 (Ubuntu 15.2.0-16ubuntu1), ./build_clean_linux64.sh with default options (drivers included), no extra compiler flags:

• Before: the build stops in build_resources with 'uint64_t' has not been declared errors.
• After: the build completes and produces all 48 driver libraries.

Merge Danger

Door: two-way

Blast Radius: build only (include lines and the C standard setting)