docs: SDK new migration guide

[yagopv]

This pull request adds migration documentation for upgrading to protocol-kit v7, introducing support for Safe v1.5.0 smart contracts and outlining several breaking and non-breaking changes. It also updates the documentation metadata to include the new migration guide

Documentation updates:

• Added a new migration guide, migrate-to-v7.md, detailing all breaking changes, new features, and deprecations for Safe v1.5.0 support, including code samples and migration strategies
• Updated _meta.json to include the new "Migrate to v7" guide in the documentation navigation

---

Note

Low Risk
Documentation-only change that adds a new migration guide and updates navigation metadata; no runtime or contract behavior is modified.

Overview
Adds a new migrate-to-v7 documentation page describing the Protocol Kit v7 migration path for Safe v1.5.0, including noted breaking changes (default Safe version bump, moved encodeTransactionData, signature-validation updates, and SafeVersion type extension) plus new v1.5.0 features and deprecations.

Updates pages/sdk/protocol-kit/guides/_meta.json to include the new guide in the docs navigation.

^{Written by Cursor Bugbot for commit 628ff3e. This will update automatically on new commits. Configure here.}

[github-actions]

Branch preview

✅ Deployed successfully in branch deployment:

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

[github-actions]

Overall readability score: 36.95 (🟢 +0.09)

File	Readability
migrate-to-v7.md	70.6 (-)

View detailed metrics

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

File	Readability	FRE	GF	ARI	CLI	DCRS
migrate-to-v7.md	70.6	59.3	8.02	9.8	11.24	6.86
	-	-	-	-	-	-

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	36.95	31.59	13.12	16.3	14.74	8.71
	🟢 +0.09	🟢 +0.07	🟢 +0.01	🟢 +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