Added features

Added: 
Project Overview TUI 
Build Cache / Dirty Detection
Post-Build Hooks
gbuild status

Makefile

@@ -4,7 +4,7 @@
 
 CC      = gcc
 CFLAGS  = -Wall -Wextra -O2 -Iinclude
-LDLIBS_GBUILD  = -lncurses
+LDLIBS_GBUILD  = -lncurses -lpthread
 LDLIBS_GCONFIG =
 
 # ---- package metadata --------------------------------------
@@ -29,7 +29,10 @@ COMMON_SRCS = src/config.c
 
 GBUILD_SRCS = \
     src/gbuild.c   \
+    src/cache.c    \
+    src/hooks.c    \
     src/git_ops.c  \
+    src/index.c    \
     src/logger.c   \
     src/make_ops.c \
     src/tui.c      \