refactor: re-organize the layout of asset directory and write some readme

Assets/CKStateChunkFormat/README.md

@@ -0,0 +1,8 @@
+# CKStateChunk Format
+
+This directory stores the format specification for the CKStateChunk format.
+CKStateChunk is a core data structure used by Virtools engines.
+So it is important to know the format of CKStateChunk.
+
+These concluded formats basically are based on the decompile result.
+For view them, just use a web browser to open `CKStateChunk.html` in this directory.

Assets/Decompile/README.md

@@ -0,0 +1,5 @@
+# Decompile Assets
+
+This directory stores some decompile result written at the early development stage of this project.
+Basically they do not have some meanings but I want to keep them.
+Maybe I can utilize them in some days.

Assets/Tools/MeshConv/README.md

@@ -10,4 +10,4 @@ Build complete Wavefront OBJ file from separated data for debugging libcmo21.
     * Vertex normal as `VertexNormal.bin` for example.
     * Vertex UV as `VertexUV.bin` for example.
     * Face indices as `FaceIndices.bin` for example.
-- Execute `uv run main.py -p VertexPosition.bin -n VertexNormal.bin -u VertexUV.bin -i FaceIndices.bin -o mesh.obj -m mesh.mtl` for example. It will utilize previous saved file to generate a Wavefront OBJ file `mesh.obj` and corresponding material file `mesh.mtl`. For the usage of these switches, please refer to the source code.
+- Execute `uv run main.py -p VertexPosition.bin -n VertexNormal.bin -u VertexUV.bin -i FaceIndices.bin -o mesh.obj -m mesh.mtl` for example. It will utilize previous saved file to generate a Wavefront OBJ file `mesh.obj` and corresponding material file `mesh.mtl`. For the usage of these switches, please pass `--help` to the program.