NFC refactoring (#3050)

"A long time ago in a galaxy far, far away...." we started NFC subsystem refactoring.

Starring:

- @gornekich - NFC refactoring project lead, architect, senior developer
- @gsurkov - architect, senior developer
- @RebornedBrain - senior developer

Supporting roles:

- @skotopes, @DrZlo13, @hedger - general architecture advisors, code review
- @Astrrra, @doomwastaken, @Hellitron, @ImagineVagon333 - quality assurance

Special thanks:

@bettse, @pcunning, @nxv, @noproto, @AloneLiberty and everyone else who has been helping us all this time and contributing valuable knowledges, ideas and source code.

lib/nfc/nfc_common.h

@@ -0,0 +1,22 @@
+/**
+ * @file nfc_common.h
+ * @brief Various common NFC-related macros.
+ */
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* NFC file format version which changed ATQA format. Deprecated. */
+#define NFC_LSB_ATQA_FORMAT_VERSION (2)
+/* NFC file format version which is still supported as backwards compatible. */
+#define NFC_MINIMUM_SUPPORTED_FORMAT_VERSION NFC_LSB_ATQA_FORMAT_VERSION
+/* NFC file format version which implemented the unified loading process. */
+#define NFC_UNIFIED_FORMAT_VERSION (4)
+/* Current NFC file format version. */
+#define NFC_CURRENT_FORMAT_VERSION NFC_UNIFIED_FORMAT_VERSION
+
+#ifdef __cplusplus
+}
+#endif