Added Cmake file

CmakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.12)
+
+# Project name and C++ standard
+project(fsh LANGUAGES CXX)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Source files
+set(FSH_SOURCE_FILES
+    src/fsh.cpp
+    src/lexer.cpp
+    src/ast/ast.cpp
+    src/ast/ast_exec.cpp
+    src/ast/ast_print.cpp
+    src/util/input.cpp
+    src/util/text.cpp
+    src/cmd/cmd_base.cpp
+    src/main.cpp
+)
+
+# Include directories
+include_directories(include)
+
+# Add executable
+add_executable(fsh ${FSH_SOURCE_FILES})