refactor: change view to schema

.gitignore

Web/drawingView.html

Web/searchView.html

src/main/java/com/ic/er/Attribute.java

src/main/java/com/ic/er/ER.java

src/main/java/com/ic/er/Entity.java

src/main/java/com/ic/er/Relationship.java

src/main/java/com/ic/er/Schema.java

src/main/java/com/ic/er/Trans.java

src/main/java/com/ic/er/common/SchemaDeserializer.java

src/main/java/com/ic/er/dao/SchemaMapper.java

src/main/java/com/ic/er/entity/AttributeDO.java

src/main/java/com/ic/er/entity/EntityDO.java

src/main/java/com/ic/er/entity/RelationshipDO.java

src/main/java/com/ic/er/entity/SchemaDO.java

src/main/resources/mapper/AttributeMapper.xml

src/main/resources/mapper/EntityMapper.xml

src/main/resources/mapper/RelationshipMapper.xml

src/main/resources/mapper/SchemaMapper.xml

src/main/resources/mybatis-config-postgre.xml