catalog: populate the 2D taxonomy and expose it on the site (batch G)

The ledger's top item. The audit's sharpest coverage finding was not a
missing source: camera_perspective was set on 11 of 294 entries and
grid_dimensions on 6, the site exposed neither, and a developer could not
ask the catalog for a top-down 2D tileset. The schema had already solved
the problem and nothing had filled it in.

camera_perspective 11 -> 28, grid_dimensions 6 -> 11.

Populated only where the entry's own body already states the fact, so this
restates what the catalog knows rather than making new claims, and no
verified: date moves. 2d_flat on the 13 icon, cursor, clipart and
illustration sets that describe themselves as UI or vector art with no world
camera. side_scroller on four that say so, including luizmelo-evil-wizard,
whose notes read "expect a side-view platformer layout". grid_dimensions on
five that state their pixel grid in prose.

Deliberately left absent where the body does not say. kenney-1-bit-pack and
kenney-tiny-dungeon read as top-down roguelike tiles and ox72-dungeon-tileset
is the sibling of an entry already classified 3/4 view, but none of the three
states its perspective, and inferring one would be the same mistake as
inferring a license. Aggregators and palette packs stay absent because mixed
content has no single answer.

New check V12: camera_perspective must be one of the four documented values,
grid_dimensions must be WxH, hardware_tags must be a list. These were
documented in TEMPLATE.md and enforced nowhere, so a typo would have shipped
silently and quietly dropped entries from a filter built on them.

Site: a View filter with URL state (?view=side_scroller), the grid and
perspective shown on each row, both surfaced in the entry dialog, and the
active-filter chip. Verified in a browser: the filter restores from the URL,
side-scroller returns 7 entries, flat UI 16, and no console errors.

Worth reading the result honestly. top_down now returns exactly one entry,
Dungeon Crawl Stone Soup Tiles, which is needs-review. That is the coverage
gap the task test found, and it is now visible in the UI instead of hidden
behind an unpopulated field.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wc67NX9MM964uaVGn4bpZJ

Author: TMHSDigital

catalog/2d/bootstrap-icons.md

@@ -10,6 +10,7 @@ commercial: true
 attribution_required: false
 formats: [SVG, WOFF, WOFF2]
 tags: [icons, mit, svg, ui, bootstrap]
+camera_perspective: 2d_flat
 verified: 2026-08-24
 status: active
 ---

catalog/2d/game-icons-net.md

@@ -11,6 +11,7 @@ attribution_required: true
 attribution_string: "Icons made by {author}. Available on https://game-icons.net"
 formats: [SVG, PNG]
 tags: [icons, vector, monochrome]
+camera_perspective: 2d_flat
 verified: 2026-08-15
 status: active
 ---

catalog/2d/heroicons.md

@@ -10,6 +10,7 @@ commercial: true
 attribution_required: false
 formats: [SVG, React, Vue]
 tags: [mit, icons, tailwind, ui]
+camera_perspective: 2d_flat
 verified: 2026-07-19
 status: active
 ---

catalog/2d/kenney-1-bit-pack.md

@@ -11,6 +11,7 @@ commercial: true
 attribution_required: false
 formats: [PNG]
 tags: [cc0, 1-bit, roguelike, rpg, pixel, kenney]
+grid_dimensions: 16x16
 verified: 2026-07-19
 status: active
 ---

catalog/2d/kenney-cursor-pack.md

@@ -11,6 +11,7 @@ commercial: true
 attribution_required: false
 formats: [PNG]
 tags: [cc0, cursor, pointer, ui, kenney]
+camera_perspective: 2d_flat
 verified: 2026-07-19
 status: active
 ---

catalog/2d/kenney-pixel-platformer.md

@@ -11,6 +11,8 @@ commercial: true
 attribution_required: false
 formats: [PNG]
 tags: [cc0, pixel, platformer, tiles, kenney]
+grid_dimensions: 18x18
+camera_perspective: side_scroller
 verified: 2026-07-19
 status: active
 ---

catalog/2d/kenney-tiny-dungeon.md

@@ -11,6 +11,7 @@ commercial: true
 attribution_required: false
 formats: [PNG]
 tags: [cc0, dungeon, sewer, roguelike, pixel, kenney, tiny]
+grid_dimensions: 16x16
 verified: 2026-07-19
 status: active
 ---

catalog/2d/kenney-ui-pack.md

@@ -11,6 +11,7 @@ commercial: true
 attribution_required: false
 formats: [PNG]
 tags: [cc0, ui, buttons, panels, kenney]
+camera_perspective: 2d_flat
 verified: 2026-07-19
 status: active
 ---

catalog/2d/lucide-icons.md

@@ -10,6 +10,7 @@ commercial: true
 attribution_required: false
 formats: [SVG]
 tags: [icons, brand-free, r04]
+camera_perspective: 2d_flat
 verified: 2026-08-24
 status: active
 ---

catalog/2d/luizmelo-evil-wizard.md

@@ -11,6 +11,7 @@ commercial: true
 attribution_required: false
 formats: [PNG]
 tags: [pixel, platformer, boss, cc0]
+camera_perspective: side_scroller
 verified: 2026-08-24
 status: active
 ---