Add native contract install UI

[charlesHetterich]

Summary

• run dot contract install through dot's native Ink UI and @dotdm/contracts install backend instead of spawning cdm
• update cdm.json and TypeScript/Solidity post-install outputs locally after successful installs
• preserve existing cdm.json target keys and prefer targets with dependencies when reinstalling
• stop installing the CDM CLI during dot init; install cargo-pvm-contract directly from the charles/cdm-integration branch instead

Verification

• pnpm build
• pnpm format:check
• pnpm lint:license
• pnpm test
• smoke: dot contract i @polkadot/contexts

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​@​dotdm/​contracts@​3.0.0 ⏵ 3.1.0	-2

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[github-actions]

Dev build ready — try this branch:

curl -fsSL https://raw.githubusercontent.com/paritytech/playground-cli/main/install.sh | VERSION=dev/contract-install-tui bash

[github-actions]

E2E Test Pass · ✅ PASS

Tag: e2e-ci-pr · Branch: contract-install-tui · Commit: f4c3745 · Run logs

Cell	Result	Time
pr-deploy-cdm	✅ PASS	2m46s
pr-install	✅ PASS	0m46s
pr-deploy-foundry	✅ PASS	0m40s
pr-deploy-frontend	✅ PASS	3m18s
pr-preflight	✅ PASS	1m22s
pr-mod	✅ PASS	1m19s
pr-init-session	✅ PASS	3m21s
${{ matrix.cell }}	⏭️ SKIP	0m00s
${{ matrix.cell }}	⏭️ SKIP	0m00s

Sentry traces: view spans for this run