Merge branch 'dev' into f-find-query

CHANGELOG.md

caosdb-proto

src/doc/entities.png

src/doc/entities.svg

...main/java/org/caosdb/server/datatype/BooleanDatatype.java

src/main/java/org/caosdb/server/datatype/DoubleDatatype.java

...main/java/org/caosdb/server/datatype/IntegerDatatype.java

src/main/java/org/caosdb/server/datatype/TextDatatype.java

.../caosdb/server/entity/container/TransactionContainer.java

...n/java/org/caosdb/server/grpc/CaosDBToGrpcConverters.java

.../org/caosdb/server/grpc/EntityTransactionServiceImpl.java

.../java/org/caosdb/server/jobs/core/CheckQueryTemplate.java

src/main/java/org/caosdb/server/jobs/core/ExecuteQuery.java

src/main/java/org/caosdb/server/query/CQLParser.g4

src/main/java/org/caosdb/server/query/Query.java

src/test/java/org/caosdb/server/query/TestCQL.java