docs(protocol): add typed edge link protocol documentation
Add comprehensive documentation for the link protocol supporting
typed edges in body text. This includes specification for three
legal inline forms (bare wikilink, line-level Dataview,
inline-bracketed Dataview), predicate syntax rules, and the
machine-managed Relations section convention for organizing
discovered edges.
fix(memory): update path reference from vault_root to working_dir
Change the memory_create operation's path anchoring from
vault_root to working_dir to maintain consistency with the
current working directory configuration.
refactor(components): remove edge_extractor module and simplify parsing
Remove the edge_extractor component module entirely and
inline edge extraction logic directly into LinkedFileParser
using parse_wikilinks utility. This simplifies the architecture
by eliminating the separate edge extraction component and
delegating edge discovery to the maintainer's enrichment operations.
feat(parser): update parse method signature and simplify edge extraction
Modify LinkedFileParser to return (FileNode, list[FileChunk])
tuple instead of ParsedFile, remove dependency on BaseEdgeExtractor,
and implement direct wikilink parsing from body text only.
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