Bring ECMA-SL's concrete evaluation to encoding

[filipeom]

Needed in order to allow for the completion of formalsec/ECMA-SL#20

• ☑️ Exists
• ❌ TODO
• ⛔ Will not support
• ❗ Might exist, needs verification
• ❓ Don't know yet, don't add for now

Unary

Operators	Status	New Name
Typeof	⛔
Neg	☑️
BitwiseNot	☑️
LogicalNot	☑️
IntToFloat	☑️
IntToString	☑️
IntToFourHex	⛔
OctalToDecimal	⛔
FloatToInt	☑️
FloatToString	☑️
ToInt	⛔
ToInt32	⛔
ToUint16	⛔
ToUint32	⛔
IsNaN	☑️
StringToInt	☑️
StringToFloat	☑️
FromCharCode	☑️
FromCharCodeU	⛔
ToCharCode	☑️
ToCharCodeU	⛔
ToLowerCase	⛔
ToUpperCase	⛔
Trim	☑️
StringLen	☑️	Length
StringLenU	⛔
StringConcat	☑️
ObjectToList	⛔
ObjectFields	⛔
ArrayLen	⛔
ListToArray	⛔
ListHead	❌	Head
ListTail	❌	Tail
ListLen	❌	Length
ListSort	⛔
ListReverse	❌	Reverse
ListRemoveLast	⛔
TupleFirst	❌	Head
TupleSecond	❌	Tail
TupleLen	❌	Length
FloatToByte	⛔
Float32ToLEBytes	⛔
Float32ToBEBytes	⛔
Float64ToLEBytes	⛔
Float64ToBEBytes	⛔
Float32FromLEBytes	⛔
Float32FromBEBytes	⛔
Float64FromLEBytes	⛔
Float64FromBEBytes	⛔
BytesToString	⛔
Random	⛔
Abs	☑️
Sqrt	☑️
Ceil	☑️
Floor	☑️
Trunc	☑️
Exp	☑️
Log2	⛔
LogE	⛔
Log10	⛔
Sin	⛔
Cos	⛔
Tan	⛔
Sinh	⛔
Cosh	⛔
Tanh	⛔
Asin	⛔
Acos	⛔
Atan	⛔
Utf8Decode	⛔
HexDecode	⛔
ParseNumber	⛔
ParseString	⛔
ParseDate	⛔

Binary

Operator	Status	New Name
Plus	☑️
Minus	☑️
Times	☑️
Div	☑️
Modulo	☑️
Pow	☑️
BitwiseAnd	☑️
BitwiseOr	☑️
BitwiseXor	☑️
ShiftLeft	☑️
ShiftRight	☑️
ShiftRightLogical	☑️
LogicalAnd	☑️
LogicalOr	☑️
SCLogicalAnd	☑️
SCLogicalOr	☑️
Eq	☑️
NE	☑️
Lt	☑️
Gt	☑️
Le	☑️
Ge	☑️
ToPrecision	⛔
ToExponential	⛔
ToFixed	⛔
ObjectMem	⛔
StringNth	☑️
StringNthU	⛔
StringSplit	⛔
ArrayMake	⛔
ArrayNth	⛔
ListMem	⛔
ListNth	❌	At
ListAdd	❌	List_append_last
ListPrepend	❌	List_append
ListConcat	❌	Concat
ListRemove	⛔
ListRemoveNth	⛔
TupleNth	❌	At
IntToBEBytes	⛔
IntFromLEBytes	⛔
UintFromLEBytes	⛔
Min	☑️
Max	☑️
Atan2	⛔

Ternary

Operator	Status	New Name
ITE	☑️
StringSubstr	☑️
StringSubstrU	⛔
ArraySet	⛔
ListSet	❌	List_set

N-Ary

Operator	Status
NAryLogicalAnd	⛔
NAryLogicalOr	⛔
ArrayExpr	☑️
ListExpr	☑️
TupleExpr	☑️