Update Hecke banner (#1675)

* Update Hecke banner

* Fix coloring

README.md

@@ -68,24 +68,16 @@ If your research depends on computations done with Hecke, please consider giving
 
 Here is a quick example of using Hecke:
 
-```julia
+```
 julia> using Hecke
-
-Welcome to
-
-    _    _           _
-   | |  | |         | |
-   | |__| | ___  ___| | _____
-   |  __  |/ _ \/ __| |/ / _ \
-   | |  | |  __/ (__|   <  __/
-   |_|  |_|\___|\___|_|\_\___|
-
-Version 0.22.8...
- ... which comes with absolutely no warranty whatsoever
-(c) 2015-2024 by Claus Fieker, Tommy Hofmann and Carlo Sircana
-
-
-julia> Qx, x = polynomial_ring(FlintQQ, "x");
+ _    _           _          
+| |  | |         | |         |  Software package for
+| |__| | ___  ___| | _____   |  algorithmic algebraic number theory
+|  __  |/ _ \/ __| |/ / _ \  |  
+| |  | |  __/ (__|   <  __/  |  Manual: https://thofma.github.io/Hecke.jl
+|_|  |_|\___|\___|_|\_\___|  |  Version 0.34.6
+
+julia>  Qx, x = polynomial_ring(FlintQQ, "x");
 
 julia> f = x^3 + 2;
 

src/Hecke.jl

@@ -145,22 +145,19 @@ end
 global const maximal_order = MaximalOrder
 
 function _print_banner()
+  printstyled(raw""" _    _           _          """, color = :red)
   println("")
-  print("Welcome to \n")
-  printstyled(raw"
-    _    _           _
-   | |  | |         | |
-   | |__| | ___  ___| | _____
-   |  __  |/ _ \/ __| |/ / _ \
-   | |  | |  __/ (__|   <  __/
-   |_|  |_|\___|\___|_|\_\___|", color = :red)
-  println()
-  println()
-  print("Version")
-  printstyled(" $VERSION_NUMBER ", color = :green)
-  print("... \n ... which comes with absolutely no warranty whatsoever")
-  println()
-  println("(c) 2015-2024 by Claus Fieker, Tommy Hofmann and Carlo Sircana")
+  printstyled(raw"""| |  | |         | |         """, color = :red)
+  println("|  Software package for")
+  printstyled(raw"""| |__| | ___  ___| | _____   """, color = :red)
+  println("|  algorithmic algebraic number theory")
+  printstyled(raw"""|  __  |/ _ \/ __| |/ / _ \  """, color = :red)
+  println("|  ")
+  printstyled(raw"""| |  | |  __/ (__|   <  __/  """, color = :red)
+  println("|  Manual: https://thofma.github.io/Hecke.jl")
+  printstyled(raw"""|_|  |_|\___|\___|_|\_\___|  """, color = :red)
+  print("|  Version ")
+  printstyled("$VERSION_NUMBER", color = :green)
   println()
 end