add tile model

.idea/.gitignore

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+# Default ignored files
+/workspace.xml

.idea/MahjongServer.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JavaScriptSettings">
+    <option name="languageLevel" value="ES6" />
+  </component>
+</project>

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/MahjongServer.iml" filepath="$PROJECT_DIR$/.idea/MahjongServer.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

Model/Tile.go

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+package Model
+
+type Suit int
+
+const (
+	Character Suit = iota
+	Bamboo
+	Dot
+	Bonus
+	Wind
+	Dragon
+	Flower
+	Season
+)
+
+type Tile struct {
+	Suit   Suit `json:"suit"`
+	Number int  `json:"number"`
+}

main.go

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+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Hello,world")
+}