feat!: profiles overhaul

[BlankParticle]

Middle of stack #1236: feat/clikit → feat/profile → feat/cli-overhaul.

This PR rebuilds authentication around named profiles and consumes CliKit from #1233 for every interactive authentication flow.

alchemy profile
alchemy profile edit
alchemy profile refresh
alchemy profile create|rename|list|show|current|delete

What changes

• A built-in default profile with explicit --profile / ALCHEMY_PROFILE selection.
• A versioned manifest for non-secret configuration and atomic 0600 per-profile credential storage.
• A typed AuthProvider contract and registry discovered from provider layers.
• Schema decoding at profile boundaries, with actionable reconfiguration errors for invalid entries.
• Authentication happens only through profile commands; deploy, plan, and dev never open surprise wizards.
• Browser OAuth, stored credentials, environment credentials, and provider-specific configuration share one contract.
• Cloudflare OAuth account discovery uses memberships with the accounts endpoint as fallback.
• Explicit environment credentials override an implicit profile outside CI; explicit profile selection remains authoritative.
• CI reads provider environment contracts without touching local profile state.
• Scriptable configuration supports --method, --set key=value, env:VAR, and stdin-backed secrets.
• Effect-native cross-process locking protects credential reads and refreshes.

Command migration

Old	New
alchemy login	alchemy profile
alchemy login --configure	alchemy profile edit
alchemy profile clear	alchemy profile delete

The top PR keeps removed command names only as hidden moved-command hints. It also migrates the remaining legacy CLI surfaces and deletes the old renderer.

[alchemy-version-bot]

Install the packages built from this commit:

Alchemy

alchemy

bun add https://pkg.ing/alchemy/b710174

@alchemy.run/better-auth

bun add https://pkg.ing/@alchemy.run/better-auth/b710174

@alchemy.run/cloudflare-runtime

bun add https://pkg.ing/@alchemy.run/cloudflare-runtime/b710174

@alchemy.run/frontend-frameworks

bun add https://pkg.ing/@alchemy.run/frontend-frameworks/b710174

@alchemy.run/node-utils

bun add https://pkg.ing/@alchemy.run/node-utils/b710174

@alchemy.run/pr-package

bun add https://pkg.ing/@alchemy.run/pr-package/b710174

@alchemy.run/floci

bun add https://pkg.ing/@alchemy.run/floci/b710174

Distilled

@distilled.cloud/core

bun add https://pkg.ing/@distilled.cloud/core/dd2a322

@distilled.cloud/aws

bun add https://pkg.ing/@distilled.cloud/aws/dd2a322

@distilled.cloud/axiom

bun add https://pkg.ing/@distilled.cloud/axiom/dd2a322

@distilled.cloud/cloudflare

bun add https://pkg.ing/@distilled.cloud/cloudflare/dd2a322

@distilled.cloud/hetzner

bun add https://pkg.ing/@distilled.cloud/hetzner/dd2a322

@distilled.cloud/neon

bun add https://pkg.ing/@distilled.cloud/neon/dd2a322

@distilled.cloud/planetscale

bun add https://pkg.ing/@distilled.cloud/planetscale/dd2a322