Major clean up and improvements to vimwiki compatibility and documentation.

Reviewed-on: #1

crates/nuwiki-core/src/ast/block.rs

@@ -1,6 +1,4 @@
 //! Block-level AST nodes and their supporting types.
-//!
-//! See SPEC.md §6.4.
 
 use super::inline::InlineNode;
 use super::span::Span;
@@ -17,7 +15,7 @@ pub enum BlockNode {
     DefinitionList(DefinitionListNode),
     Table(TableNode),
     Comment(CommentNode),
-    /// Vimwiki tag line — `:tag1:tag2:`. Phase 12 (v1.1). The placement
+    /// Vimwiki tag line — `:tag1:tag2:`. The placement
     /// rule (file / heading / standalone) is captured in `TagScope` so
     /// LSP handlers and renderers can treat the three differently.
     Tag(TagNode),