Fix mini-epaper-s3 build: resolve SensorLib isBitSet macro conflict with SparkFun MMC5983MA (#10584)

* Initial plan

* Fix SensorLib isBitSet macro conflict with SparkFun MMC5983MA library

SensorLib 0.3.4 defines isBitSet as a C preprocessor macro in SensorLib.h,
which conflicts with SparkFun_MMC5983MA_IO.h's class method of the same name.
When both libraries are included in the same translation unit (e.g., via
configuration.h → SensorRtcHelper.hpp → SensorLib chain, alongside the
SparkFun MMC5983MA library in lib_deps), the macro expansion causes compile
errors like 'expected unqualified-id before const'.

Fix: undefine the isBitSet macro right after including SensorRtcHelper.hpp
in configuration.h, so it doesn't interfere with SparkFun's class method.

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

src/configuration.h

@@ -31,6 +31,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #endif
 #if __has_include("SensorRtcHelper.hpp")
 #include "SensorRtcHelper.hpp"
+// SensorLib defines isBitSet as a macro; undefine it here to avoid conflicts
+// with the SparkFun MMC5983MA library, which has a class method of the same name.
+#ifdef isBitSet
+#undef isBitSet
+#endif
 #endif
 
 /* Offer chance for variant-specific defines */