feat: add the m15-family, classic-family and pw-borderless-family templates

[snyderks]

Summary

Three templates converted from Proxyshop's own PSDs with the engine's psdconvert and tplmerge commands (odevine/mimic#134 and the PR after it, not yet merged), covering eighteen card shapes between them:

• m15-family: the modern M15 frame across standard, split, transform, MDFC, planeswalker, planeswalker MDFC/transform, adventure, leveler, mutate, prototype, battle, saga and class.
• classic-family: the old rounded, mana-colored border for standard cards and basic lands.
• pw-borderless-family: the full-bleed borderless planeswalker frame for a single-faced planeswalker and both faces of its MDFC or transform card.

Each member's own psdconvert recipe is checked in under recipes/<family>/, named by the id psdconvert was given, for provenance.

Not registered with release-please yet. m15-family and pw-borderless-family need sections (a saga's chapters, a class's levels, a planeswalker's loyalty abilities) and classic-family needs TextStyle.Prefix (the classic frame's "Illus. " artist credit), neither of which is in a released engine yet. version stays at 0.0.0 in all three. Registering them with release-please, and wiring make convert/check-convert up for a multi-source family the way they already work for m15's single recipe, are both tracked as follow-ups — the same two-step split went through for its own engine dependency (see 6ffa8fc).

Test plan

• Validated against a local engine checkout carrying the needed changes: all three clean aside from pre-existing cosmetic notes already accepted for the single-kind conversions they're made from
• All three pack to the same bytes on a second run (reproducible build)
• Recipe JSON validated

🤖 Generated with Claude Code

https://claude.ai/code/session_01XRUBuanCoioaJx1YjULfbQ