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

tldr/doctl-databases-pool

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# doctl databases pool
+
+> Manage connection pools for your database cluster.
+> More information: <https://docs.digitalocean.com/reference/doctl/reference/databases/pool/>.
+
+- Run a `doctl databases pool` command with an access token:
+
+`doctl databases pool {{command}} --access-token {{access_token}}`
+
+- Retrieve information about a database connection pool:
+
+`doctl databases pool get {{database_id}} {{pool_name}}`
+
+- List connection pools for a database cluster:
+
+`doctl databases pool list {{database_id}}`
+
+- Create a connection pool for a database:
+
+`doctl databases pool create {{database_id}} {{pool_name}} --db {{new_pool_name}} --size {{pool_size}}`
+
+- Delete a connection pool for a database:
+
+`doctl databases pool create {{database_id}} {{pool_name}}`