Update C#/.NET and Python skill packs for paypal, shutterstock, twilio (0.3.1 → 0.3.2)

[mrafnadeem-apimatic]

Updates the C#/.NET and Python skill packs for paypal, shutterstock and twilio from their regenerated APIMatic v4 SDKs, and patch-bumps each to 0.3.2.

These three were held out of #110 because they also ship a TypeScript pack, and that PR's C#/Python-only regeneration would have deleted 10 TypeScript skill files from each. This change is therefore deliberately partial.

What changed

Plugin	Version	C# SDK	Python SDK
paypal	0.3.1 → 0.3.2	paypal-csharp-sdk 705249a	paypal-python-sdk 0ed3d22
shutterstock	0.3.1 → 0.3.2	shutterstock-csharp-sdk a3a85df	shutterstock-python-sdk f9e5e3e
twilio	0.3.1 → 0.3.2	twilio-csharp-sdk f36ff90	twilio-python-sdk cb311ab

Also removes the ## Install — from source section from paypal and shutterstock's dotnet and python getting-started skills, matching the convention #110 established for the other 10 plugins. twilio's were already stripped.

What deliberately did not change

• The TypeScript packs. skills/typescript/ is untouched in all three plugins.
• The plugin READMEs. main's READMEs already document all three languages correctly. The freshly generated README is worse — it titles the plugin PayPal Server SDK SDK Plugin (the generator appends "SDK" to a title that already ends in it) and lowercases the python language label — so main's version is kept and the generated one discarded.
• Manifest metadata. author, homepage, repository, description and the 3-entry skills array are preserved from main; only version moves.

Verified by hashing all 33 TypeScript and README files before and after the update: 0 changed, 0 added, 0 removed.

Verification

• Pure content diff: 24 files, every one a modification — no adds, deletes or renames.
• sync_marketplace.py --check → In sync: 24 plugins, both registries, README.md, CLAUDE.md.
• Counts unchanged at 24 plugins / 61 language packs / 549 skills, confirming no pack was dropped.
• All 24 manifest trios agree on name/version, and name equals the directory name.
• The 9 manifests written here were re-normalised to LF (Python's write_text emits CRLF on Windows).
• Underlying SDKs verified before this refresh: C# dotnet build 0 warnings/0 errors; Python imports with mypy clean (twilio 1645 files, paypal 463, shutterstock 390).

Follow-up not in this PR

Each plugin's TypeScript getting-started skill still carries an ## Install section, so these three are internally inconsistent until TypeScript is refreshed too. Their plugin-config.json files now declare typescript alongside csharp/python, so a TypeScript pass is the natural next step — it would want its own SDK generation, verification and push rather than riding along here.

🤖 Generated with Claude Code