octez-client: add page (#13325)

Co-authored-by: spageektti <git@spageektti.cc>
Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/common/octez-client.md

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+# octez-client
+
+> Interact with the Tezos blockchain.
+> More information: <https://tezos.gitlab.io/introduction/howtouse.html#client>.
+
+- Configure the client with a connection to a Tezos RPC node such as <https://rpc.ghostnet.teztnets.com>:
+
+`octez-client -E {{endpoint}} config update`
+
+- Create an account and assign a local alias to it:
+
+`octez-client gen keys {{alias}}`
+
+- Get the balance of an account by alias or address:
+
+`octez-client get balance for {{alias_or_address}}`
+
+- Transfer tez to a different account:
+
+`octez-client transfer {{5}} from {{alias|address}} to {{alias|address}}`
+
+- Originate (deploy) a smart contract, assign it a local alias, and set its initial storage as a Michelson-encoded value:
+
+`octez-client originate contract {{alias}} transferring {{0}} from {{alias|address}} running {{path/to/source_file.tz}} --init "{{initial_storage}}" --burn_cap {{1}}`
+
+- Call a smart contract by its alias or address and pass a Michelson-encoded parameter:
+
+`octez-client transfer {{0}} from {{alias|address}} to {{contract}} --entrypoint "{{entrypoint}}" --arg "{{parameter}}" --burn-cap {{1}}`
+
+- Display help:
+
+`octez-client man`