refactor(项目结构) 重构为 workspace 多成员项目

- 将项目拆分为三个 crate：minicpm-core（核心模型）、minicpm-convert（转换功能）、minicpm-inference（推理功能）
- 添加两个示例：minimal-inference（最小推理）和 convert（模型转换）
- 转换后自动拷贝 config.json 和 tokenizer.json 到 model 目录
- 更新 README 说明 workspace 结构和使用方式

Cargo.lock

@@ -84,56 +84,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "anstream"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "824a212faf96e9acacdbd09febd34438f8f711fb84e09a8916013cd7815ca28d"
-dependencies = [
- "anstyle",
- "anstyle-parse",
- "anstyle-query",
- "anstyle-wincon",
- "colorchoice",
- "is_terminal_polyfill",
- "utf8parse",
-]
-
-[[package]]
-name = "anstyle"
-version = "1.0.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "940b3a0ca603d1eade50a4846a2afffd5ef57a9feac2c0e2ec2e14f9ead76000"
-
-[[package]]
-name = "anstyle-parse"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "52ce7f38b242319f7cabaa6813055467063ecdc9d355bbb4ce0c68908cd8130e"
-dependencies = [
- "utf8parse",
-]
-
-[[package]]
-name = "anstyle-query"
-version = "1.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
-dependencies = [
- "windows-sys 0.61.2",
-]
-
-[[package]]
-name = "anstyle-wincon"
-version = "3.0.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
-dependencies = [
- "anstyle",
- "once_cell_polyfill",
- "windows-sys 0.61.2",
-]
-
 [[package]]
 name = "anyhow"
 version = "1.0.103"
@@ -1282,46 +1232,6 @@ dependencies = [
  "libloading 0.8.9",
 ]
 
-[[package]]
-name = "clap"
-version = "4.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ddb117e43bbf7dacf0a4190fef4d345b9bad68dfc649cb349e7d17d28428e51"
-dependencies = [
- "clap_builder",
- "clap_derive",
-]
-
-[[package]]
-name = "clap_builder"
-version = "4.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "714a53001bf66416adb0e2ef5ac857140e7dc3a0c48fb28b2f10762fc4b5069f"
-dependencies = [
- "anstream",
- "anstyle",
- "clap_lex",
- "strsim",
-]
-
-[[package]]
-name = "clap_derive"
-version = "4.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2ce8604710f6733aa641a2b3731eaa1e8b3d9973d5e3565da11800813f997a9"
-dependencies = [
- "heck",
- "proc-macro2",
- "quote",
- "syn 2.0.118",
-]
-
-[[package]]
-name = "clap_lex"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8d4a3bb8b1e0c1050499d1815f5ab16d04f0959b233085fb31653fbfc9d98f9"
-
 [[package]]
 name = "codespan-reporting"
 version = "0.13.1"
@@ -1339,12 +1249,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
 
-[[package]]
-name = "colorchoice"
-version = "1.0.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d07550c9036bf2ae0c684c4297d503f838287c83c53686d05370d0e139ae570"
-
 [[package]]
 name = "colored"
 version = "3.1.1"
@@ -1437,6 +1341,15 @@ version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "136d3e02915a2cea4d74caa8681e2d44b1c3254bdbf17d11d41d587ff858832c"
 
+[[package]]
+name = "convert"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "burn",
+ "minicpm-convert",
+]
+
 [[package]]
 name = "convert_case"
 version = "0.8.0"
@@ -3608,12 +3521,6 @@ version = "2.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d98f6fed1fde3f8c21bc40a1abb88dd75e67924f9cffc3ef95607bad8017f8e2"
 
-[[package]]
-name = "is_terminal_polyfill"
-version = "1.70.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"
-
 [[package]]
 name = "itertools"
 version = "0.11.0"
@@ -4052,19 +3959,46 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
 [[package]]
-name = "minicpm-burn"
+name = "minicpm-convert"
 version = "0.1.0"
 dependencies = [
  "anyhow",
  "burn",
- "clap",
  "memmap2",
- "rand 0.8.6",
+ "minicpm-core",
+ "serde_json",
+]
+
+[[package]]
+name = "minicpm-core"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "burn",
  "serde",
  "serde_json",
+]
+
+[[package]]
+name = "minicpm-inference"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "burn",
+ "minicpm-core",
+ "rand 0.8.6",
  "tokenizers 0.20.4",
 ]
 
+[[package]]
+name = "minimal-inference"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "burn",
+ "minicpm-inference",
+]
+
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
@@ -4510,12 +4444,6 @@ version = "1.21.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
 
-[[package]]
-name = "once_cell_polyfill"
-version = "1.70.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"
-
 [[package]]
 name = "oneshot"
 version = "0.2.1"