wip: New assets system tm

Builds gc-eu-mq-dbg OK from clean after
1) make setup
2) python3 -m tools.assets.extract -j
3) replace 0x80A8E610 with sShadowTex in extracted/gc-eu-mq-dbg/assets/overlays/ovl_En_Jsjutan/sShadowMaterialDL.inc.c
4) make various symbols in extracted data like sTex static

tools/assets/n64.py

@@ -0,0 +1,50 @@
+import enum
+
+
+class G_IM_FMT(enum.Enum):
+    RGBA = 0
+    YUV = 1
+    CI = 2
+    IA = 3
+    I = 4
+
+    def __init__(self, i: int):
+        self.i = i
+
+    by_i: dict[int, "G_IM_FMT"]
+
+
+G_IM_FMT.by_i = {fmt.i: fmt for fmt in G_IM_FMT}
+
+
+class G_IM_SIZ(enum.Enum):
+    _4b = (0, 4)
+    _8b = (1, 8)
+    _16b = (2, 16)
+    _32b = (3, 32)
+
+    def __init__(self, i: int, bpp: int):
+        self.i = i
+        self.bpp = bpp
+
+    by_i: dict[int, "G_IM_SIZ"]
+
+
+G_IM_SIZ.by_i = {siz.i: siz for siz in G_IM_SIZ}
+
+
+G_MDSFT_TEXTLUT = 14
+
+
+class G_TT(enum.Enum):
+    NONE = 0b00 << G_MDSFT_TEXTLUT
+    RGBA16 = 0b10 << G_MDSFT_TEXTLUT
+    IA16 = 0b11 << G_MDSFT_TEXTLUT
+
+    def __init__(self, i: int):
+        self.i = i
+
+    by_i: dict[int, "G_TT"]
+
+
+G_TT.by_i = {tt.i: tt for tt in G_TT}