feat: implement archive reader/writer with round-trip test

test/gmake.mk

@@ -0,0 +1,28 @@
+CC := cc
+CFLAGS = -Wall -Wpedantic -I../include -std=c89
+LDFLAGS = -L../bin/debug -lfpk
+
+ifeq ($(OS),Windows_NT)
+    SHELL := cmd.exe
+    .SHELLFLAGS := /c
+    EXE_EXT = .exe
+else
+    EXE_EXT =
+endif
+
+.PHONY: all test clean
+
+all: test
+
+test_program$(EXE_EXT): test.c
+	$(CC) $(CFLAGS) -o $@ test.c $(LDFLAGS)
+
+test: test_program$(EXE_EXT)
+	@./test_program$(EXE_EXT)
+
+clean:
+ifeq ($(OS),Windows_NT)
+	@del /Q test_program.exe 2>nul || true
+else
+	@rm -f test_program
+endif