style(clang-tidy): partially fix misc-include-cleaner (#1753)

Refs #1684

Signed-off-by: Balakrishna Avulapati <ba@bavulapati.com>

Author: bavulapati

src/core/uri/escaping.cc

@@ -5,7 +5,10 @@
 #include <algorithm> // std::copy
 #include <cassert>   // assert
 #include <cctype>    // std::isalnum
+#include <istream>   // std::istream
+#include <ostream>   // std::ostream
 #include <sstream>   // std::ostringstream
+#include <string>    // std::string
 
 namespace sourcemeta::core {