feat(feature): display vendor positions on feature pages and overview

[jcscottiii]

This commit introduces the display of vendor standards positions on both the feature detail page and the main feature overview table.

Key changes:

• Frontend:
  • A new VendorPosition class and VendorPositions factory are introduced for type-safe parsing of the vendor position data from the API.
  • The feature detail page now renders a 'Vendor positions' section.
  • The main feature overview table now displays vendor position tags inline with the feature name.
• Fake Data: The fake data generator is updated to produce vendor position data.
• Testing: New unit tests for the VendorPosition class and updated Playwright snapshots are included.

[DanielRyanSmith]

Approving with some optional suggestions

[jcscottiii]

For this, I actually added code to generate the enums from the jsonschema:

webstatus.dev/jsonschema/web-platform-dx_web-features-mappings/combined-schema.gen.json

Lines 188 to 212 in 932d7cc

	"type": "object",
	"properties": {
	"vendor": {
	"type": "string",
	"enum": [
	"mozilla",
	"webkit"
	]
	},
	"url": {
	"type": "string",
	"format": "uri"
	},
	"position": {
	"type": "string",
	"enum": [
	"",
	"blocked",
	"defer",
	"negative",
	"neutral",
	"oppose",
	"positive",
	"support"
	]

That way I can keep it aligned and not manually maintain the list of possible vendors.

GitHub CI is having unrelated problems with devcontainer. But this all works locally