[Themes] Render deprecation warning when poll flag is provided to TS dev command

[jamesmengo]

WHY are these changes introduced?

• https://github.com/Shopify/develop-advanced-edits/issues/199

WHAT is this pull request doing?

Renders a warning to the user when they provide the poll flag in the TS flow

How to test your changes?

pnpm shopify theme dev --path=<PATH_TO_THEME> --dev-preview --poll

If you run into issues on the build step relating to authentication, you may need to remove app-management from allAPIs in packages/cli-kit/src/private/node/api.ts

Measuring impact

How do we know this change was effective? Please choose one:

• n/a - this doesn't need measurement, e.g. a linting rule or a bug-fix
• Existing analytics will cater for this addition
• PR includes analytics changes to measure impact

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've made sure that any changes to dev or deploy have been reflected in the internal flowchart.

[github-actions]

We detected some changes at either packages/*/src or packages/cli-kit/assets/cli-ruby/** and there are no updates in the .changeset.
If the changes are user-facing, run "pnpm changeset add" to track your changes and include them in the next release CHANGELOG.

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	71.96% (-0.01% 🔻)	7025/9763
🟡	Branches	68.8% (-0.01% 🔻)	3477/5054
🟡	Functions	71.47%	1881/2632
🟡	Lines	73.27% (-0.01% 🔻)	6622/9038

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🔴	... / partners-client.ts	19.8%	33.33% (-1.28% 🔻)	15.56%	19.79%
🟢	... / ConcurrentOutput.tsx	97.62% (-2.38% 🔻)	75% (-8.33% 🔻)	100%	97.44% (-2.56% 🔻)

Test suite run success

1649 tests passing in 766 suites.

Report generated by 🧪jest coverage report action from b4fd01b

[karreiro]

Thank you, @jamesmengo!