añadido todo lo referente a paises

src/main/java/com/imprimelibros/erp/paises/Paises.java

@@ -0,0 +1,82 @@
+package com.imprimelibros.erp.paises;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "paises")
+public class Paises {
+
+    @Id
+    @Column(name = "keyword", length = 64, nullable = false)
+    private String keyword;
+
+    @Column(name = "code", length = 2, nullable = false, unique = true)
+    private String code;
+
+    @Column(name = "code3", length = 3, nullable = false, unique = true)
+    private String code3;
+
+    @Column(name = "currency", length = 3, nullable = false)
+    private String currency;
+
+    // --- Getters & Setters ---
+
+    public String getKeyword() {
+        return keyword;
+    }
+
+    public void setKeyword(String keyword) {
+        this.keyword = keyword;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public void setCode(String code) {
+        this.code = code;
+    }
+
+    public String getCode3() {
+        return code3;
+    }
+
+    public void setCode3(String code3) {
+        this.code3 = code3;
+    }
+
+    public String getCurrency() {
+        return currency;
+    }
+
+    public void setCurrency(String currency) {
+        this.currency = currency;
+    }
+
+    // --- toString, equals & hashCode ---
+
+    @Override
+    public String toString() {
+        return "Paises{" +
+                "keyword='" + keyword + '\'' +
+                ", code='" + code + '\'' +
+                ", code3='" + code3 + '\'' +
+                ", currency='" + currency + '\'' +
+                '}';
+    }
+
+    @Override
+    public int hashCode() {
+        return keyword != null ? keyword.hashCode() : 0;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (!(obj instanceof Paises other)) return false;
+        return keyword != null && keyword.equals(other.keyword);
+    }
+}