Write language component data structures

[chipsenkbeil]

Top-level issue for writing a vimwiki data model for language components. This is the precursor to #8 as we need the data model to put the parser content into.

• Typefaces (vimwiki-syntax-typefaces)
  • Bold text
  • Italic text
  • Bold italic text
  • Strikeout text
  • Code (no syntax) text
  • Super script
  • Sub script
• Links (vimwiki-syntax-links)
  • Plain link
  • Link with description
  • Subdirectory link
  • Relative link
  • Absolute link
  • External local box links (// prefix)
  • Subdirectory links
  • Interwiki links
  • Diary links
  • Anchors (under links and vimwiki-anchors)
  • Raw URLs
  • External files (file: or local:)
  • Transclusion (wiki-include) links
  • Thumbnail links
• Headers (vimwiki-syntax-headers)
  • Normal header with levels
  • Centered header (spaces in front)
  • Table of Contents (vimwiki-toc) (no difference in data model)
• Paragraphs (vimwiki-syntax-paragraphs)
  • Group of lines starting in column 1 (no indentation)
  • Blank line separating paragraphs
• Lists (vimwiki-syntax-lists)
  • Unordered
  • Ordered
  • Nested (for either of above)
  • Spanning multiple lines
  • Spanning multiple lines with sub items inbetween
  • Definition lists
  • Todo lists (vimwiki-todo-lists)
• Tables (vimwiki-syntax-tables and vimwiki-tables)
  • Plain text version
  • Formatting inside each cell
  • Divider rows
• Preformatted text (vimwiki-syntax-preformatted)
  • Plain block
  • Optional information after {{{
• Mathematical formulae (vimwiki-syntax-math)
  • Inline math
  • Block display
  • Block environment
• Blockquotes (vimwiki-syntax-blockquotes)
• Comments (vimwiki-syntax-comments)
  • Single line using %%
  • Multi-line using %%+ and +%%
• Horizontal line (vimwiki-syntax-hr)
  • Four or more dashes at start of line
• Tags (vimwiki-syntax-tags)
  • Single tag :name:
  • Multi-tag :name1:name2:...
• Placeholders (vimwiki-placeholders)
  • Title (vimwiki-title)
  • No HTML (vimwiki-nohtml)
  • Template (vimwiki-template)
  • Date (vimwiki-date)