Table Dialect specification (#41)

* Added general/csv props

* Added excel/db

* Added json

* Updated profile section

* Updated the profile

* Fixed spelling

* Removed db for now; focus on csv/json/excel at the beggining

* Updated CSV Dialect mention

* Fixed quoteChar

* Fixed doubleQuote

* Fixed header

* Updated introduction

* Fixed the link

* Update content/docs/specifications/table-dialect.md

Co-authored-by: Peter Desmet <peter.desmet@inbo.be>

* Update content/docs/specifications/table-dialect.md

Co-authored-by: Peter Desmet <peter.desmet@inbo.be>

* Update content/docs/specifications/table-dialect.md

Co-authored-by: Peter Desmet <peter.desmet@inbo.be>

* Added caseSensitiveHeader note

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Co-authored-by: Peter Desmet <peter.desmet@inbo.be>