0.3.0

feat: click an ingredient to search the vault for it

Wikilinks were the wrong primary path. [[Parmesan]] only pays off for
someone who already keeps a note per ingredient, and nobody does; every
recipe just accumulates unresolved links.

Searching needs no setup and works on the vault you already have. Clicking
an ingredient opens the vault search with the quantity stripped, so
'400 g of minced beef' searches for "minced beef". The slot was free:
operations tick, ingredients did nothing.

ingredient.ts guesses where the quantity ends, which is deliberate and not
in tension with scaffold.ts refusing to guess the tree. A wrong search term
costs a broader search the user edits; a wrong tree would be silently
wrong. Guess only where a mistake is visible and cheap.

Wikilinks still work for those who want them, and a link inside a cell
navigates rather than searching or ticking.

Adds a full lasagne example to the README: two preparation steps, three
components, an assembly step consuming two of them, and two operations
sharing a column.