Add Program infrastructure

default.gpr

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+project Default is
+    for Source_Dirs use ("src");
+    for Object_Dir use "obj";
+    for Exec_Dir use "bin";
+    for Main use ("main.adb");
+    for Languages use ("Ada");
+end Default;

src/main.adb

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+-- main.adb
+-- Created on: Thu 01 Feb 2024 09:33:13 CET
+-- Author(s): Yannick Reiß
+-- Content: Compiler main call
+with Ada.Text_IO;
+with Ada.Command_Line;
+
+-- @name Main
+-- @return
+-- @description Main Function call
+procedure Main is
+
+begin
+
+end Main;

test.gpr

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+project Test is
+    for Source_Dirs use ("src");
+    for Object_Dir use "obj";
+    for Exec_Dir use "bin";
+    for Main use ("testbench.adb");
+    for Languages use ("Ada");
+end Test;
+