Furi: core refactoring and CMSIS removal part 2 (#1410)

* Furi: rename and move core
* Furi: drop CMSIS_OS header and unused api, partially refactor and cleanup the rest
* Furi: CMSIS_OS drop and refactoring.
* Furi: refactoring, remove cmsis legacy
* Furi: fix incorrect assert on queue deallocation, cleanup timer
* Furi: improve delay api, get rid of floats
* hal: dropped furi_hal_crc
* Furi: move DWT based delay to cortex HAL
* Furi: update core documentation

Co-authored-by: hedger <hedger@nanode.su>

furi/core/log.c

@@ -0,0 +1,66 @@
+#include "log.h"
+#include "check.h"
+#include "mutex.h"
+#include <furi_hal.h>
+
+#define FURI_LOG_LEVEL_DEFAULT FuriLogLevelInfo
+
+typedef struct {
+    FuriLogLevel log_level;
+    FuriLogPuts puts;
+    FuriLogTimestamp timetamp;
+    FuriMutex* mutex;
+} FuriLogParams;
+
+static FuriLogParams furi_log;
+
+void furi_log_init() {
+    // Set default logging parameters
+    furi_log.log_level = FURI_LOG_LEVEL_DEFAULT;
+    furi_log.puts = furi_hal_console_puts;
+    furi_log.timetamp = furi_get_tick;
+    furi_log.mutex = furi_mutex_alloc(FuriMutexTypeNormal);
+}
+
+void furi_log_print(FuriLogLevel level, const char* format, ...) {
+    if(level <= furi_log.log_level &&
+       furi_mutex_acquire(furi_log.mutex, FuriWaitForever) == FuriStatusOk) {
+        string_t string;
+
+        // Timestamp
+        string_init_printf(string, "%lu ", furi_log.timetamp());
+        furi_log.puts(string_get_cstr(string));
+        string_clear(string);
+
+        va_list args;
+        va_start(args, format);
+        string_init_vprintf(string, format, args);
+        va_end(args);
+
+        furi_log.puts(string_get_cstr(string));
+        string_clear(string);
+
+        furi_mutex_release(furi_log.mutex);
+    }
+}
+
+void furi_log_set_level(FuriLogLevel level) {
+    if(level == FuriLogLevelDefault) {
+        level = FURI_LOG_LEVEL_DEFAULT;
+    }
+    furi_log.log_level = level;
+}
+
+FuriLogLevel furi_log_get_level(void) {
+    return furi_log.log_level;
+}
+
+void furi_log_set_puts(FuriLogPuts puts) {
+    furi_assert(puts);
+    furi_log.puts = puts;
+}
+
+void furi_log_set_timestamp(FuriLogTimestamp timestamp) {
+    furi_assert(timestamp);
+    furi_log.timetamp = timestamp;
+}