refactor: move to third-party folder

.gitignore

@@ -37,6 +37,7 @@ _deps
 .history
 .ionide
 
+.cache
 optLP
 build
 .vscode

.gitmodules

-[submodule "libs/or-tools"]
-	path = libs/or-tools
+[submodule "third-party/or-tools"]
+	path = third-party/or-tools
 	url = https://github.com/google/or-tools.git

CMakeLists.txt

@@ -10,20 +10,15 @@ set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
-# Ensure that or-tools library is built statically
+# Ensure that libraries are built statically
 set(BUILD_DEPS ON)
 set(BUILD_SHARED_LIBS OFF)
 
 # Installing folder
 set(INSTALL_FOLDER ${optlp_SOURCE_DIR}/assets)
 
-# libraries PATH
-set(LIBS_DIR ${CMAKE_CURRENT_SOURCE_DIR}/libs)
-
-# add ortools library
-set(ORTOOLS_DIR "${LIBS_DIR}/or-tools")
-message(STATUS "Building or-tools ...")
-add_subdirectory(${ORTOOLS_DIR})
+# Third-party libraries
+add_subdirectory(third-party)
 
 # add includes folder
 include_directories(include)

README.md

 # optlp
 
 ```sh
-git clone --recursive https://depot.lipn.univ-paris13.fr/hadhami.ouni/optlp
+git clone --recursive https://depot.lipn.univ-paris13.fr/PMC-SOG/optlp
 ```
 
 ## Description
@@ -50,6 +50,7 @@ function minimizes the cost of coverage by reducing the sum of the lengths of
 the selected paths.
 
 ## Requirements
+
 Make sure to install the necessary dependencies before running the program:
 
 - `gcc` >= 9.3.0
@@ -67,6 +68,7 @@ cmake --install build       # installs the project: ./assets/optlp
 ```
 
 ## Run
+
 Once installed, the binary `optlp` will be in the `assets` folder.
 
 ```sh
@@ -85,6 +87,7 @@ To generate a random graph, use the following options:
          --nb-edges <m> \
          --nb-labels <l>
 ```
+
 where:
 
 - `--nb-nodes <n>`: Specifies the number of nodes in the graph.
@@ -92,6 +95,7 @@ where:
 - `--nb-labels <l>`: Specifies the number of labels in the graph.
 
 **Example:**
+
 ```sh
 ./optlp --nb-nodes 200 --nb-edges 100 --nb-labels 20
 ```
@@ -117,17 +121,16 @@ where:
 ```
 
 ### Help
+
 If no options are provided or the help option is specified, the program will
 display a help message with usage instructions.
 
-
 ```sh
 ./optlp --help
 ```
 
 The help message will display the following:
 
-
 ```sh
 /**************************************************************/
 /********************         help         ********************/

third-party/CMakeLists.txt

+# ortools library
+message(STATUS "Building or-tools ...")
+add_subdirectory("or-tools")