Add canperformance.c and modify Makefile for CAN performance testing.

### What's Done
1. Added a new file named canperformance.c to the project.
2. Modified the Makefile to support the compilation of canperformance.c.

### Core Idea
The addition of canperformance.c aims to meet CAN performance testing needs, compensating for cangen's deficiencies.

### Key Features
- Support for standard and extended frames
- Support for file sending and receiving
- Real - time frame rate display
- MD5 verification for CAN ID, Data, or files

Makefile

@@ -123,7 +123,8 @@ PROGRAMS := \
 	log2asc \
 	log2long \
 	mcp251xfd-dump \
-	slcanpty
+	slcanpty \
+	canperformance
 
 ifeq ($(HAVE_FORK),1)
 PROGRAMS += \
@@ -228,3 +229,6 @@ can-calc-bit-timing: calc-bit-timing/can-calc-bit-timing.o
 
 mcp251xfd-dump: mcp251xfd/mcp251xfd-dev-coredump.o mcp251xfd/mcp251xfd-dump.o mcp251xfd/mcp251xfd-main.o mcp251xfd/mcp251xfd-regmap.o
 	$(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@
+
+canperformance: canperformance.o
+	$(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@