Bump version to 2.0.3

[ochafik]

Summary

Bumps the root package and all example workspaces from 2.0.2 to 2.0.3. This is the patch release that ships two dependency fixes for published example packages, so a fresh install of each one resolves a tree that passes vulnerability and supply-chain scans:

• @cantoo/pdf-lib pinned to 2.6.5 for @modelcontextprotocol/server-pdf (Pin @cantoo/pdf-lib to 2.6.5 in pdf-server #792).
• solid-js 1.9.15 for @modelcontextprotocol/server-basic-solid, with the other npm audit fixes (Update dependencies to clear npm audit findings #793).

The library itself is unchanged. Version-only diff: no dependency, lockfile-resolution or source changes.

Test plan

• npm run bump patch then npm run check:versions passes (root 2.0.3); npm audit reports 0 vulnerabilities on a clean npm ci.
• Every changed line is a "version" field (55 in, 55 out across 28 files), and the lockfile has no non-npmjs resolved URLs.
• The pre-commit hook (npm run build:all, prettier) passed; the full suite is left to CI on this PR.

After merge, gh release create v2.0.3 on main starts the publish workflow.