implemented welcome interface

src/main.py

+import typing as tp
+
+import static_solvers
+import dynamic_solvers
+import functions
+
+from tabulate import tabulate
+import typer
+
+
+STATIC_METHODS = [
+    static_solvers.left_rectangle_method,
+    static_solvers.right_rectangle_method,
+    static_solvers.trapezium_method,
+    static_solvers.parabola_method,
+]
+DYNAMIC_METHODS = [
+    dynamic_solvers.cordic_method,
+    dynamic_solvers.double_recalculate_method,
+    dynamic_solvers.runge_kutty_method,
+    dynamic_solvers.euler_method,
+    dynamic_solvers.mysterious_method,
+]
+ALL_METHODS = [
+    *STATIC_METHODS,
+    *DYNAMIC_METHODS,
+]
+
+ALL_FUNCTIONS = [
+    functions.fn_sin,
+    functions.fn_cos,
+    functions.fn_ln,
+    functions.fn_sqrt,
+    functions.fn_square,
+    functions.fn_cube,
+]
+
+
+def list_methods() -> None:
+    headers = ["№", "Название метода"]
+    method_names = [method.__doc__ for method in ALL_METHODS]
+    method_table = tabulate(
+        tabular_data=[[no, name] for no, name in enumerate(method_names, start=1)],
+        headers=headers,
+    )
+    typer.echo("Доступные методы с постоянным и переменным шагом:")
+    typer.echo(method_table + "\n")
+
+
+def list_functions() -> None:
+    headers = ["№", "Функция"]
+    function_names = [function.__doc__ for function in ALL_FUNCTIONS]
+    function_table = tabulate(
+        tabular_data=[[no, name] for no, name in enumerate(function_names, start=1)],
+        headers=headers,
+    )
+    typer.echo("Доступные функции для интегрирования:")
+    typer.echo(function_table + "\n")
+
+
+def main() -> None:
+    typer.echo("ЛР1: Система решения ОДУ")
+    typer.echo("Работу выполнили: Величко А.А., Галкин И.Ю., Егоров С.А., Адаев Р.М. ИВТ 2 курс\n")
+
+    list_methods()
+    list_functions()
+
+
+if __name__ == "__main__":
+    typer.run(main)