Move pages under tldr, lint run.sh, update docs

tldr/couchdb

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# couchdb
+
+> Command-line interface for Apache CouchDB database server.
+> More information: <https://couchdb.apache.org>.
+
+- Start CouchDB:
+
+`couchdb`
+
+- Start CouchDB interactive shell:
+
+`couchdb -i`
+
+- Start CouchDB as a background process:
+
+`couchdb -b`
+
+- Kill the background process (Note: It will respawn if needed):
+
+`couchdb -k`
+
+- Shutdown the background process:
+
+`couchdb -d`