Reorganize assets; switch the HUD to the Micro Chat font

Source packs move to assets/packs (untouched), maps to assets/maps, and the
palette/sketch leftovers from the 8-bit era go. tools/mkfont.py repacks
VEXED's Micro Chat sheet (8-column grid, 8x10 cells) into the CP437 atlas
layout the font loader already reads, cropped to 8x9 so the HUD can use an
8 px line height. The CGA atlas is dropped in its favor.

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

assets/packs/Mini-Medieval-Arctic-Documented-8x8/Palette/Mini-Medieval-Palette-Text-Ref.md

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+# Mini Medieval Pallete Text Ref
+This text collection of colors is organized as a companion to the `Mini-Medieval-Palette-Visual-Ref.png` image. All sections are organized from darkest to lightest. Anything in `()` is referencing an expansion or a context.
+
+Cheers,
+-- VEXED
+
+## Black, Gray, and White
+
+- #120e23
+- #534664
+- #6f6e72
+- #aea47e
+- #dacea4 (User Interface)
+- #fff1a9 (Snow & Highlights)
+
+## Blue-green
+
+- #349c58
+- #6dba79 (Ice)
+
+## Blue
+
+- #2a2942
+- #24505f
+- #2a7d75
+
+## Purples
+
+- #3a1b40
+- #7a2849
+
+## Pinks
+
+- #c23753
+- #e67a84
+
+## Reds/Orange
+
+- #b74132
+- #e67146
+
+## Browns/Yellows
+
+- #402e2b
+- #764032
+- #a15c34 (Dirt)
+- #c78539
+- #ebb85b (Sand)
+
+## Greens
+
+- #56642e
+- #7e9432 (Grass)
+- #c9c03d

assets/packs/Mini-Medieval-Arctic-Documented-8x8/README.txt

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+Mini Medieval Arctic v2.1
+-------------------------
+
+
+Enjoy my assets? Keep up to date by following me on itch or X.
+
+https://v3x3d.itch.io/
+https://x.com/_V3X3D
+
+You can also support me on Patreon for just a $1 each month.
+Your support helps me keep making assets and provides you with rewards.
+
+https://www.patreon.com/V3X3D
+
+
+Cheers,
+-- VEXED