Fix API sample responses and request parameters

[louis-md]

This PR fixes four bugs with the API reference after the transaction service upgraded it's Swagger version:

• Query parameters' types were not displayed
• Sample responses were not displayed
• Typescript examples were not displayed
• Response parameters with multiple types were not displayed correctly (e.g. stringnull instead of string | null)

[github-actions]

Branch preview

✅ Deployed successfully in branch deployment:

https://fix_api_reference--docs.review.5afe.dev

[github-actions]

Overall readability score: 31.53 (🔴 -0.09)

File	Readability
generated-reference.mdx	49.94 (🟢 +0)

View detailed metrics

🟢 - Shows an increase in readability
🔴 - Shows a decrease in readability

File	Readability	FRE	GF	ARI	CLI	DCRS
generated-reference.mdx	49.94	41.9	12.16	14.6	12.53	7.45
	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	31.53	27.46	13.67	17.39	15.72	8.97
	🔴 -0.09	🔴 -0.05	🔴 -0.02	🔴 -0.02	🔴 -0.01	🟢 +0

View metric targets

Metric	Range	Ideal score
Flesch Reading Ease	100 (very easy read) to 0 (extremely difficult read)	60
Gunning Fog	6 (very easy read) to 17 (extremely difficult read)	8 or less
Auto. Read. Index	6 (very easy read) to 14 (extremely difficult read)	8 or less
Coleman Liau Index	6 (very easy read) to 17 (extremely difficult read)	8 or less
Dale-Chall Readability	4.9 (very easy read) to 9.9 (extremely difficult read)	6.9 or less

[valle-xyz]

LGTM! I checked the bugs on Arbitrum and Base, and all are resolved as expected.