Feature/Add Heading Tablelist for New Page

[mosleim]

Description

Adding feature for TableList heading on new page when list exceeds page bottom margin
Related Issue

related to this issue #130
Checklist

check with "x", if applied to your change

• All methods associated with structs has func (s *struct) method() {} name style.
• Wrote unit tests for new/changed features.
• Updated docs/doc.go
• Updated pkg/pdf/example_test.go
• Updated README.md
• Updated all examples inside internal/examples
• New public methods/structs/interfaces has comments upside them explaining they responsibilities
• Executed go fmt github.com/johnfercher/maroto/... to format all files