[Docs] wrangler dev - undocumented/inadequately documented flags

[rozenmd]

Excluding deprecated flags (which shouldn't be shown in --help - #1981), we need to either document, or improve the documentation of the following fields for wrangler dev

Undocumented

• --no-bundle Skip internal build steps and directly publish script [boolean] [default: false]
• --assets Static assets to be served [string]
• --var A key-value pair to be injected into the script as a variable [array]
  • [Wrangler] Document --var in dev/publish cloudflare-docs#6154
• --define A key-value pair to be substituted in the script [array]
  • [Wrangler] Document --define for dev/publish cloudflare-docs#6160
• --experimental-local Run on my machine using the Cloudflare Workers runtime [boolean] [default: false]
• --local-upstream Host to act as origin in local mode, defaults to dev.host or route [string]
• --node-compat Enable node.js compatibility [boolean]
• --persist Enable persistence for local mode, using default path: .wrangler/state [boolean]
• --persist-to Specify directory to use for local persistence (implies --persist) [string]
• --log-level Specify logging level [choices: "debug", "info", "log", "warn", "error", "none"] [default: "log"]

Inadequately documented

• --compatibility-date Date to use for compatibility checks [string]
• --routes, --route Routes to upload [array]
• -l, --local Run on my machine [boolean] [default: false]