feat: Add console scripts to start Deephaven from the command line

[deephaven-internal]

This issue was auto-generated

PR: https://github.com/deephaven/deephaven-core/pull/5275 Author: mofojed

Original PR Body

• Added console scripts to the embedded server to add a deephaven console script that can launch deephaven
• Tested by building and installing the deephaven_server whl
• deephaven is the root script, with server being the only positional "command" argument and ran by default
  • Figured I'd add command as a positional argument, in case we want to add other commands (e.g. run to run a specific file)
• Parse arguments for host, port, jvm-args, and extra-classpath
  • If no key provided, a random key is generated
• After starting, waits for the user to press Ctrl+C to exit

Examples: deephaven server: Starts up Deephaven server on port 8080 with a random key and opens the web UI. deephaven server --port 9999: Starts up Deephaven on port 9999. deephaven server --jvm-args="-Ddeephaven.dataDir=/tmp/deephaven": Starts up Deephaven with /tmp/deephaven as the data directory. deephaven server --port 9999 --jvm-args="-Ddeephaven.dataDir=/tmp/deephaven-data -Ddeephaven.console.disable=true": Starts up Deephaven on port 9999, using /tmp/deephaven as the data directory and the console disabled. deephaven --help: Prints help about what commands are available deephaven server --help: Prints help about the server comand