feat: add kernel ACPI support for querying battery percentage, add battery indicator to desktop, move log state to 0:/state directory

programs/src/desktop/Makefile

@@ -56,7 +56,7 @@ LDFLAGS := \
 
 # ---- C++ source files ----
 
-CORE_SRCS := main.cpp window.cpp panel.cpp wifi.cpp compose.cpp input.cpp dialogs.cpp launcher.cpp desktop_builtin.cpp desktop_catalog.cpp font_data.cpp stb_truetype_impl.cpp
+CORE_SRCS := main.cpp window.cpp panel.cpp wifi.cpp battery.cpp compose.cpp input.cpp dialogs.cpp launcher.cpp desktop_builtin.cpp desktop_catalog.cpp font_data.cpp stb_truetype_impl.cpp
 APP_SRCS  := $(sort $(shell find apps -name '*.cpp' -print))
 SRCS      := $(CORE_SRCS) $(APP_SRCS)
 OBJS      := $(addprefix $(OBJDIR)/,$(SRCS:.cpp=.o))