Add PAPER WINDOW as the starter scenario Adventure

The six-player introductory case ships as a Foundry Adventure in a new `starter` pack,
because a scenario that arrives as nine loose documents a GM has to assemble is a
scenario that gets read rather than run.

One import brings in: the GM scenario in twelve pages; the seven player handouts as
their own journal at OBSERVER ownership so they can be revealed one at a time without
the GM editing permissions first, while the GM text stays hidden; the six pregens built
through the same buildActor path the shipped pregens use, so they arrive with full skill
lists, kit, hit points and linked tokens; the cast, including the Cancellation Man; the
Borrowed Authority as a real credential with scope, Trust 2 and its three red flags; and
the case file already at Containment 8 / Resources 8 / Clearance 6 with its four phases
loaded at the stated difficulties and modifiers.

Pregen ratings are fixed at mid-band rather than rolled — a pregen that varies between
installs is not a pregen. The expansion from posting or trade into a sheet reuses the
register and the induction rule rather than restating them, so the starter cannot drift
from the generator.

Verified by importing it: no errors, the roster resolves through stable keys, handouts
arrive player-visible, Nia has the team's highest Tradecraft as the text requires,
Callum's shield is slung so raising it is still a decision, the three probationers show
the trade/induction split, and phase one runs out of the box.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

packs/gear/CURRENT

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-MANIFEST-000002
+MANIFEST-000004

packs/gear/LOG

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-2026/08/11-22:56:53.174127 172e3b000 Delete type=3 #1
+2026/08/11-23:23:08.316151 174adb000 Recovering log #3
+2026/08/11-23:23:08.316320 174adb000 Level-0 table #5: started
+2026/08/11-23:23:08.316628 174adb000 Level-0 table #5: 31614 bytes OK
+2026/08/11-23:23:08.316965 174adb000 Delete type=0 #3
+2026/08/11-23:23:08.317018 174adb000 Delete type=3 #2

packs/gear/LOG.old

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+2026/08/11-23:22:30.829491 170973000 Delete type=3 #1