chore: create DISCLAIMER file for ASF (#35)
diff --git a/DISCLAIMER b/DISCLAIMER
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+Apache HugeGraph (incubating) is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator PMC.
+
+Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications,
+and decision making process have stabilized in a manner consistent with other successful ASF projects.
+
+While incubation status is not necessarily a reflection of the completeness or stability of the code,
+it does indicate that the project has yet to be fully endorsed by the ASF.
