libremail: Add shared try_mkdir() function

Signed-off-by: Chloe M. <chloe@mirocom.org>

libremail/Makefile

@@ -0,0 +1,25 @@
+# Copyright (c) 2026, Chloe Moffett
+# Provided under the BSD-3 clause
+#
+
+CFILES = $(shell find . -name "*.c")
+OFILES = $(CFILES:.c=.o)
+DFILES = $(CFILES:.c=.d)
+CC = gcc
+
+CFLAGS = 				\
+	-Wall				\
+	-pedantic			\
+	-MMD				\
+	-Iinc
+
+.PHONY: all
+all: $(OFILES)
+
+-include $(DFILES)
+%.o: %.c
+	$(CC) -c $< $(CFLAGS) -o $@
+
+.PHONY: clean
+clean:
+	rm -f $(OFILES) $(DFILES)