chore: add Renovate release-age gate and keep example algosdk in lockstep

[drichar]

Summary

Two changes to the Renovate config so the issues fixed manually in #24 don't come back:

• minimumReleaseAge: "2 days": Renovate waits until a release is 2 days old before proposing it. chore(deps): Update all non-major dependencies #24 pulled in algosdk 3.9.0 about 5 hours after it was published, and the non-major group automerges, so new releases could otherwise reach main with no waiting period.
• rangeStrategy: "bump" for algosdk: because of :preserveSemverRanges, Renovate bumped the SDK's pinned algosdk devDependency but left the examples at ^3.5.2. Two copies got installed, their types clashed, and examples/node-cli failed to build with TS2322. The rule bumps the examples' ranges along with the SDK's pinned version. It only matches dependencies and devDependencies, so the SDK's ^3.0.0 peer range is never widened or narrowed for consumers.

Testing

• renovate-config-validator passes
• prettier --check renovate.json passes