fix: Add framebuffer release/realloc and improved lazy indexing (#2563)

lib/hal/HalDisplay.cpp

@@ -77,6 +77,10 @@ void HalDisplay::deepSleep() { einkDisplay.deepSleep(); }
 
 uint8_t* HalDisplay::getFrameBuffer() const { return einkDisplay.getFrameBuffer(); }
 
+uint8_t* HalDisplay::lendFrameBufferStorage(uint32_t* sizeOut) { return einkDisplay.lendBuildStorage(sizeOut); }
+
+void HalDisplay::returnFrameBufferStorage() { einkDisplay.returnBuildStorage(); }
+
 void HalDisplay::copyGrayscaleBuffers(const uint8_t* lsbBuffer, const uint8_t* msbBuffer) {
   einkDisplay.copyGrayscaleBuffers(lsbBuffer, msbBuffer);
 }