Refresh the framework-owned sections of a project's AGENTS.md after a
Wagoe upgrade.

`wagoe new` renders AGENTS.md from a template that evolves with the
framework (new pitfalls, conventions, modules). This command re-renders the
marker-delimited blocks from the currently installed CLI's template and
splices them into the project file, leaving everything the user wrote
outside the markers untouched.

Synced blocks:
  <!-- gen:fc-is -->               FC/IS rules
  <!-- gen:naming -->              case conventions
  <!-- gen:pitfalls -->            common pitfalls
  <!-- wagoe:available-modules -->  module table

NOT synced (project state): <!-- wagoe:installed-modules -->. Rows for
already-installed modules are re-removed from the refreshed available
table, mirroring what `wagoe add` did at install time.

`wagoe doctor` — the one answer to "something is wrong".

Six commands could tell you something was wrong (`bb doctor`, `bb
doctor:env`, `bb doctor --all`, `bb check`, `bb smoke-check`, `bb guide
next`) and nothing said which to reach for first. This runs the diagnostic
ones in the order their answers depend on each other and ends with one next
action (BOU-324).

It orchestrates rather than diagnoses. Every check still lives in
wagoe-tools behind its `bb` task — those remain the machinery, and CI calls
them directly with `--ci`. This reads their `--edn` output, which is why that
mode exists: picking one action out of formatted terminal text would mean
parsing colour codes and column padding.

Ordering is not cosmetic. A missing Java makes every later answer noise, and
an unparseable config makes the command smoke checks fail for a reason that
has nothing to do with the commands. So a stage with errors stops the run and
says so, rather than burying its own finding under three more screens.

Shared template helpers for the wagoe CLI: template loading, {{var}}
rendering, and the module-row pattern used to keep AGENTS.md's available-
modules table in sync (`wagoe add` removes a row at install time;
`wagoe agents update` keeps it removed on refresh).