Search lexicons by keyword #99

Split into #

• #44: Keyword search over known lexicons
• #45: Discover lexicons from an external directory

Request #

Let the NSID inputs search by keyword ("sifa", "you and me") rather than requiring the NSID prefix.

Context #

From https://www.youtube.com/watch?v=5MnT-ZgbBIc, where the user built an automation that adds conference attendees to a Bluesky list:

• The user left Airglow for pdsls to find the NSIDs (0:32 to 0:38).
• Related: https://tangled.org/exosphere.site/airglow/issues/21.

Details: docs/brainstorms/2026-10-17-graze-conference-automation-feedback.md (F9).