gnatmake, gnatprep, gprbuild: add page (#8557)

pages/common/gprbuild.md

@@ -0,0 +1,20 @@
+# gprbuild
+
+> A high-level build tool for projects written in Ada and other languages (C/C++/Fortran).
+> More information: <https://docs.adacore.com/gprbuild-docs/html/gprbuild_ug.html>.
+
+- Build a project (assuming only one `*.gpr` file exists in the current directory):
+
+`gprbuild`
+
+- Build a specific [P]roject file:
+
+`gprbuild -P{{project_name}}`
+
+- Clean up the build workspace:
+
+`gprclean`
+
+- Install compiled binaries:
+
+`gprinstall --prefix {{path/to/installation/dir}}`