doc auto flow support

Author: Charliechen114514

Doxyfile

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+PROJECT_NAME           = "Embedded Common Tools"
+INPUT                  = lib
+RECURSIVE              = YES
+
+EXTRACT_ALL            = YES
+EXTRACT_STATIC         = YES
+EXTRACT_PRIVATE        = NO
+
+GENERATE_HTML          = NO
+GENERATE_LATEX         = NO
+GENERATE_XML           = YES
+XML_OUTPUT             = xml
+
+QUIET                  = YES
+WARNINGS               = NO

doxybook.json

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+{
+  "input": "xml",
+  "output": "documentation/api",
+  "format": "md",
+
+  "structure": {
+    "readme": "API Reference",
+    "summary": "API Summary"
+  },
+
+  "folders": {
+    "files": "files",
+    "classes": "classes",
+    "namespaces": "namespaces"
+  },
+
+  "markdown": {
+    "includeIndex": true,
+    "indexFileName": "index"
+  }
+}