Add support for LCS command

[chayim]

Redis LCS command was added in version 7.0.0 and is currently supported by the library. We should add support as documented here.

[SoulPancake]

@chayim Can I be assigned this one ?

[vmihailenco]

@SoulPancake here you go 👍

[SoulPancake]

@vmihailenco @chayim @monkey92t Since we have different return types depending on the optional arguments provided, Should we implement separate functions or do something like

func (c cmdable) LCS(ctx context.Context, key1 string, key2 string, optionalArgs ...interface{}) interface{} {
	args := []interface{}{"LCS", key1, key2}
	args = append(args, optionalArgs...)
	cmd := NewCmd(ctx, args...)
	_ = c(ctx, cmd)

	// Determine the return type based on the optional arguments
	if len(optionalArgs) == 0 {
		return cmd.String()
	} else {
		switch optionalArgs[0] {
		case "LEN":
			return cmd.Int64()
		case "IDX":
			return parseLCSIndices(cmd.String())
		case "MINMATCHLEN":
			return parseLCSMatches(cmd.String(), optionalArgs[1].(int))
		case "WITHMATCHLEN":
			return parseLCSMatches(cmd.String(), -1)
		default:
			return cmd.String()
		}
	}
}

Similar to the above idea.
Which one is a better implementation?

[monkey92t]

exp:

func (c cmdable) LPop(ctx context.Context, key string) *StringCmd {}
func (c cmdable) LPopCount(ctx context.Context, key string, count int) *StringSliceCmd {}