feat(core,webapp): support isSecret on environment variable imports #6799

Job	Run time
Detect changes	4s
typecheck / typecheck	7m 56s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 51s
webapp / 🧪 Unit Tests: Webapp (1, 8)	7m 2s
e2e-webapp / 🧪 E2E Tests: Webapp	3m 29s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	4m 6s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	4m 0s
packages / 🧪 Unit Tests: Packages (1, 1)	11m 55s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	2m 4s
internal / 🧪 Unit Tests: Internal (4, 8)	5m 53s
webapp / 🧪 Unit Tests: Webapp (5, 8)	5m 4s
sdk-compat / Bun Runtime	2m 20s
internal / 🧪 Unit Tests: Internal (2, 8)	13m 46s
webapp / 🧪 Unit Tests: Webapp (6, 8)	4m 8s
webapp / 🧪 Unit Tests: Webapp (7, 8)	8m 45s
webapp / 🧪 Unit Tests: Webapp (4, 8)	8m 37s
internal / 🧪 Unit Tests: Internal (3, 8)	8m 52s
sdk-compat / Node.js 22.12 (ubuntu-latest)	2m 13s
webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 41s
internal / 🧪 Unit Tests: Internal (1, 8)	6m 45s
sdk-compat / Deno Runtime	2m 5s
internal / 🧪 Unit Tests: Internal (5, 8)	5m 54s
webapp / 🧪 Unit Tests: Webapp (3, 8)	3m 17s
webapp / 🧪 Unit Tests: Webapp (8, 8)	7m 34s
sdk-compat / Cloudflare Workers	2m 23s
sdk-compat / Node.js 20.20 (ubuntu-latest)	2m 18s
internal / 🧪 Unit Tests: Internal (7, 8)	6m 3s
internal / 🧪 Unit Tests: Internal (8, 8)	6m 54s
internal / 🧪 Unit Tests: Internal (6, 8)	5m 11s
webapp / 📊 Merge Reports	45s
packages / 📊 Merge Reports	24s
internal / 📊 Merge Reports	26s
All PR Checks	5s
	2h 36m 50s

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