Move CScriptID to script.{h/cpp}

CScriptID should be next to CScript just as CKeyID is next to CPubKey

src/script/script.h

@@ -10,6 +10,8 @@
 #include <crypto/common.h>
 #include <prevector.h>
 #include <serialize.h>
+#include <uint256.h>
+#include <util/hash_type.h>
 
 #include <assert.h>
 #include <climits>
@@ -575,6 +577,15 @@ struct CScriptWitness
     std::string ToString() const;
 };
 
+/** A reference to a CScript: the Hash160 of its serialization */
+class CScriptID : public BaseHash<uint160>
+{
+public:
+    CScriptID() : BaseHash() {}
+    explicit CScriptID(const CScript& in);
+    explicit CScriptID(const uint160& in) : BaseHash(in) {}
+};
+
 /** Test for OP_SUCCESSx opcodes as defined by BIP342. */
 bool IsOpSuccess(const opcodetype& opcode);