加入3.5 修复水印

lib/3.5/README.md

@@ -0,0 +1,11 @@
+# Spine 3.5
+
+Official `3.5.51` tag, commit `2cd9467d2736b7f3a0b81382f117c73823bfb44b`, `spine-ts/build/spine-canvas.js`. The branch named `3.5` contains later 3.6 beta data; this bundle deliberately uses the tag.
+
+Local correction: the path-length loop uses `lengths[i]` instead of `lengths[i++]`, avoiding a double increment and NaN values.
+
+The binary compatibility layer reads 3.5 transform modes and constraint order, but does not read 3.6 dark-slot color or local/relative transform fields. Rendering uses the older attachment vertex interface. The version predates clipping attachments.
+
+The official tag includes matching 3.5.03-beta JSON/SKEL pairs for seven variants. Tank and Raptor have 3.5.49 JSON but 3.5.03-beta SKEL; these are tested independently, not compared as identical exports. No version strings or data are rewritten.
+
+License: `LICENSES/Spine-3.5-License.txt`.