move seqan3::views::complement to seqan3/alphabet/views/

[marehr]

Tasks

• [x] move seqan3::views::complement to seqan3/alphabet/views/
• [x] old header complement.hpp should be deprecated as we did with the utility move (see https://github.com/seqan/seqan3/commit/dc7862cd0010ae80d2faf001c47bcbdc944a3807)

From 2c34fcd73337c61e5a634d2cde8e6bc2a2be3201 Mon Sep 17 00:00:00 2001
From: marehr <marehr-github@marehr.dialup.fu-berlin.de>
Date: Sun, 18 Apr 2021 12:47:47 +0200
Subject: [PATCH 14/35] TODO: [MISC] move seqan3::views::complement to
 seqan3/alphabet/views/

---
 include/seqan3/range/views/complement.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/seqan3/range/views/complement.hpp b/include/seqan3/range/views/complement.hpp
index 379d005a2..defc7342c 100644
--- a/include/seqan3/range/views/complement.hpp
+++ b/include/seqan3/range/views/complement.hpp
@@ -64,6 +64,8 @@ namespace seqan3::views
  *
  * \include test/snippet/range/views/complement.cpp
  * \hideinitializer
+ *
+ * \stableapi{Since version 3.1.}
  */

 inline auto const complement = deep{std::views::transform([] (auto const in)
-- 
2.31.1