Agent Plugins 0.17.0

A tutorial takes a developer from an empty directory to a validated ESS specification and a Go
implementation that passes its conformance suite, with an agent doing the writing. The onboarding
pages install through b10x and name the five plugins that ship. The skills are verified against
ess 0.38.0.

• New page: Your first ESS specification.
  ess:specifying interviews, writes a lending-library specification, and ess validates it,
  refuses a planted mistake, generates docs and OpenAPI, and synthesizes a Go suite of 17
  scenarios that the implementation passes and a planted bug fails. Every output is from a real
  run. agentplugins-check tools validates the page's specification against the newest ess and
  runs its suite, and the ess-tutorial trial has a fresh agent follow the page.
• install.md installs every command-line tool through b10x init and b10x setup apply, and
  Metaharness through b10x install metaharness; the hand install of AEP 0.55.0 is gone.
  choose-a-plugin.md, trust-and-scope.md, the b10x reference, the golden path's prerequisites,
  the landing page, the footer and b10x:routing's resources name b10x, aep, ess,
  worktree and connectors.
• agentplugins-check refuses the retired display names "AEP Plan", "AEP Drive" and "ESS Specify".
• verified.json pins ess 0.38.0. From the trial round: ess:specifying counts "make sure it
  validates" as a request for a finished specification and allows a named refusal where synthesis
  cannot arrange the model; ess:testing-conformance generates the Go package at the module root,
  requires ESS_REPORT_FORMAT=2, and has a refused command set Outcome (beyond10x/ess#186).
• This repository's planning store is aep.project/5.