fix: add default values for flow templates

[tommybae]

Fixes missing values in

WHY are these changes introduced?

Fixes #0000

WHAT is this pull request doing?

How to test your changes?

Post-release steps

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]

Thanks for your contribution!

Depending on what you are working on, you may want to request a review from a Shopify team:

• Themes: @shopify/advanced-edits
• UI extensions: @shopify/ui-extensions-cli
  • Checkout UI extensions: @shopify/checkout-ui-extensions-api-stewardship
• Hydrogen: @shopify/hydrogen
• Other: @shopify/app-management

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	72.02% (-0.14% 🔻)	7368/10231
🟡	Branches	68.78% (-0.35% 🔻)	3611/5250
🟡	Functions	71.54% (-0.13% 🔻)	1953/2730
🟡	Lines	73.28% (-0.15% 🔻)	6949/9483

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟡	... / app_config_webhook_subscription.ts	63.64% (-36.36% 🔻)	0% (-66.67% 🔻)	50% (-50% 🔻)	63.64% (-36.36% 🔻)
🟢	... / write-app-configuration-file.ts	95.65% (-0.27% 🔻)	93.1% (-0.84% 🔻)	100%	97.67% (-0.1% 🔻)
🟢	... / ConcurrentOutput.tsx	98.39% (-1.61% 🔻)	90.91% (-4.55% 🔻)	100%	98.33% (-1.67% 🔻)
🔴	... / system.ts	5.26% (-21.05% 🔻)	0% (-20.69% 🔻)	25% (-25% 🔻)	5.56% (-22.22% 🔻)

Test suite run success

1700 tests passing in 792 suites.

Report generated by 🧪jest coverage report action from 174c208