Support all field types supported by package-spec

[endorama]

From a conversation in a recent PR:

[...] we need to support all the fields type from the specs [...]
currently we don't [...]

All available field types
Currently implemented field types

This is a recap of current implementation status:

• alias
• binary
• boolean
• byte
• constant_keyword
• date
• date_nanos
• date_range
• double
• double_range
• flattened
• float
• float_range
• geo_point
• group
• half_float
• histogram
• integer # Fleet always maps this as 'long'.
• integer_range
• ip
• ip_range
• keyword
• long
• long_range
• match_only_text
• nested
• object
• scaled_float
• short
• text
• unsigned_long
• version
• wildcard