[Pages] Update project limit docs with alternative product guidance

[krys-cf]

Summary

Updates the Pages project limit docs to align with current product direction. DEE-3720.

• Recommend Workers for Platforms and Workers Static Assets as alternatives for scale
• Clarify that Workers and Pages project limits are separate

Documentation checklist

• The change adheres to the documentation style guide.

[cloudflare-docs-bot]

Review

💡 1 suggestion found in commit ebb77bc.

Fix in your agent

Fix the following review findings in PR #32095 (https://github.com/cloudflare/cloudflare-docs/pull/32095).

Before making changes, review each finding and present a brief summary table:
- For each finding, state whether you agree, disagree, or need clarification
- If you disagree (e.g. the fix requires disproportionate effort for minimal benefit,
  or the finding is factually incorrect), explain why
- If you need clarification before deciding, ask those questions
- Then share your plan for which issues to tackle and in what order

After triaging, fix all legitimate findings. For any you decide to skip,
post a comment on this PR with the finding ID and your reasoning.

---

## Style Guide Review

### Suggestions (1)

#### SG-2b915cf9e8b7 · Bullet list with fewer than three items
- **File:** `src/content/docs/pages/platform/limits.mdx` line 84
- **Issue:** Added bullet list contains only two items.
- **Fix:** Consider rewriting the two-item list as prose.

Code Review

This code review is in beta and may not always be helpful — use your judgment.

_{No code review issues found.}

Conventions

_{No convention issues found.}

Style Guide Review

Suggestions (1)

File	Issue
pages/platform/limits.mdx line 84	Bullet list with fewer than three items — Added bullet list contains only two items. Fix: Consider rewriting the two-item list as prose.

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[MattieTK]

Fat fingered the review button @krys-cf but this looks good to me