Support Table Dialect

[peterdesmet]

CHANGELOG: https://datapackage.org/overview/changelog/#table-dialect-new CHANGELOG: https://datapackage.org/overview/changelog/#dialectschema-new

Table Dialect is the follow up of CSV Dialect and broader in scope.

• [ ] Check $schema
  • [ ] If not provided, assume v1
  • [ ] If v1: investigate effect, likely not much, since all dialect properties frictionless-r wants to support are already in v1
  • [ ] If v2: support new properties (currently none)
  • [ ] If v2+: warn that it may not understand all properties
• [ ] Update any reference to CSV Dialect
• [ ] Update properties at https://docs.ropensci.org/frictionless/reference/read_resource.html#csv-dialect (e.g. caseSensitiveHeader and csvddfVersion are removed
• [ ] Still only support delimited files
• [ ] Assume $schema: https://datapackage.org/profiles/1.0/tabledialect.json
• [ ] Figure out if there is a big difference if $schema: https://datapackage.org/profiles/2.0/tabledialect.json is provided