Initial import of LogDarioSeq baseline

Establishes version control for the personal Logseq DB fork before
starting the server-client architecture migration and domain features
described in docs/agent-guide and the approved implementation plan.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

cli/bin/playground.ml

@@ -0,0 +1,6 @@
+Melange_edn_melange.of_edn_string {|{:aaa 11}|}
+|> Melange_edn_melange.to_edn_string |> print_string
+;;
+
+Melange_edn_melange.of_edn_string {|{:aaa 11}|}
+|> Melange_edn_melange.to_json_string |> print_string