Merge branch 'f-find-query' into 'dev'

CHANGELOG.md

conf/core/server.conf

src/doc/CaosDB-Query-Language.md

src/doc/conf.py

src/doc/index.rst

src/doc/query-syntax.rst

src/main/java/org/caosdb/server/ServerProperties.java

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

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

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

src/test/docker/Dockerfile

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