lots of changes:

- added man command
- added unit tests
- fixed import+export file parameters (now -o and -r respectively)
- added README + License
- added ci pipelines

t/workflow.txtar

@@ -0,0 +1,50 @@
+# simple entry
+exec anydb -f test.db set foo bar
+
+# entry with tags
+exec anydb -f test.db set color grey -t flower,plant
+
+# simple list
+exec anydb -f test.db list
+stdout foo.*bar
+
+# wide list
+exec anydb -f test.db list -o wide
+stdout 'plant.*now.*grey'
+
+# list tagged
+exec anydb -f test.db list -t flower
+! stdout bar
+
+# list with filter
+exec anydb -f test.db list b.r
+stdout bar
+
+# get single entry
+exec anydb -f test.db get color
+stdout grey
+
+# modify
+exec anydb -f test.db set foo blah
+
+# check modified
+exec anydb -f test.db get foo
+stdout blah
+
+# modify tagged
+exec anydb -f test.db set color grey -t butterfly
+
+# check modified tagged
+exec anydb -f test.db list -t butterfly
+stdout grey
+
+# check modified tagged, make sure
+exec anydb -f test.db list -t flower
+! stdout grey
+
+# delete entry
+exec anydb -f test.db del foo
+
+# check deleted
+exec anydb -f test.db list
+! stdout bar