Rework data section types

[BlockoS]

Create a type for each data type, i.e.

typedef struct {
    DataType type;
    int32_t element_size;
    int32_t elements_per_line;
} DataHex;

typedef struct {
    DataType type;
} DataBinary;

typedef struct {
    DataType type;
    int32_t elements_per_line;
    struct {
        uint8_t data[8U];
        uint8_t length;
    } delimiter;
} DataString;

typedef struct {
    DataType type;
} DataJumpTable;

typedef union {
    DataType type;
    DataBinary bin;
    DataHex hex;
    DataString str;
    DataJumpTable tbl;
} Data;