[NUI] Document the new tags and attributes in Markup

[shrouqsabah]

Hello dears,

We need to document the added tags and attributes into markup.

Tags and attributes for each tag:

• BOLD
• ITALIC
• UNDERLINE
  • COLOR
  • HEIGHT
  • TYPE
  • DASH_GAP
  • DASH_WIDTH
• BACKGROUND
  • COLOR
• STRIKETHROUGH
  • COLOR
  • HEIGHT
• CHARACTER_SPACING
  • VALUE
• SPAN
  • FONT_FAMILY
  • FONT_SIZE
  • FONT_WEIGHT
  • FONT_WIDTH
  • FONT_SLANT
  • TEXT_COLOR
  • BACKGROUND_COLOR
  • UNDERLINE_COLOR
  • UNDERLINE_HEIGHT
  • UNDERLINE_TYPE
  • UNDERLINE_DASH_GAP
  • UNDERLINE_DASH_WIDTH
  • STRIKETHROUGH_COLOR
  • STRIKETHROUGH_HEIGHT
  • CHARACTER_SPACING_VALUE
• PARAGRAPH
  • ALIGN
• EMBEDDED_ITEM
• ANCHOR

For more details, please check DALi code:
https://review.tizen.org/gerrit/c/platform/core/uifw/dali-toolkit/+/272869/4/dali-toolkit/internal/text/markup-tags-and-attributes.h

Place of update is: https://docs.tizen.org/application/dotnet/guides/nui/text/#use-markup-styling-to-style-textlabel

Thanks,

[mijin85cho]

PR #1625 was merged, and applied to https://docs.tizen.org/application/dotnet/guides/user-interface/nui/text/.

So, I close this issue.