dropdb: add page (#16862)

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
Co-authored-by: Wiktor Perskawiec <wiktor@perskawiec.cc>

pages/common/dropdb.md

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+# dropdb
+
+> Remove a PostgreSQL database.
+> A simple wrapper around the SQL command `DROP DATABASE`.
+> More information: <https://www.postgresql.org/docs/current/app-dropdb.html>.
+
+- Destroy a database:
+
+`dropdb {{dbname}}`
+
+- Request a verification prompt before any destructive actions:
+
+`dropdb {{[-i|--interactive]}} {{database_name}}`
+
+- Connect with a specific username and destroy a database:
+
+`dropdb {{[-U|--username]}} {{username}} {{dbname}}`
+
+- Force a password prompt before connecting to the database:
+
+`dropdb {{[-W|--password]}} {{dbname}}}}`
+
+- Suppress a password prompt before connecting to the database:
+
+`dropdb {{[-w|--no-password]}} {{database_name}}`
+
+- Specify the server host name:
+
+`dropdb {{[-h|--host]}} {{host}} {{database_name}}`
+
+- Specify the server port:
+
+`dropdb {{[-p|--port]}} {{port}} {{database_name}}`
+
+- Attempt to terminate existing connections before destroying the database:
+
+`dropdb {{[-f|--force]}} {{database_name}}`