Port sqm-partner-info-modal early partner creation to 1.x

[Coleton (Locrian24)]

Summary

• Hand-ports sqm-partner-info-modal and the linked widget-verification → tax/cash connectionStatus flow from cash-reward-redemption / PR Cash reward redemption #490 onto the 1.x maintenance line.
• Adapts theming to 1.x Shoelace primary (type="primary", no 2.x --sqm-primary-button-* / BrandingConfig) and omits stateController / parseStates content-editor preview infra.
• Includes step-1 connectPartner / US & no-indirect-tax skip routing, STARTED → completeImpactConnection branching in user-info and indirect-tax forms, phone validation helpers, and the two PR Cash reward redemption #490 useTaxAndCash defect fixes (refetch from GET_USER + success/error handling before routing).

Resolved decisions (not open questions)

• publish-package.yml mint-components gap does not block this PR. 1.x never listed mint-components in that workflow; 1.x publishes have used the manual bump/build/npm publish path with publishConfig.tag: "v1-mint". Wiring mint into publish-package.yml is not a small safe fix here: 1.x mint has no prepack, and stencil build --docs has a known tax-and-cash docs stack-overflow. Defer a dedicated CI follow-up; shipping this feature still works via the existing 1.x publish path.
• Dead allowBankingCollection props left intentionally. T&C checkbox lives on the partner modal (same intent as PR Cash reward redemption #490’s “Move T&Cs checkbox…” / flagged-for-deletion on step 1). Removing the @Props from sqm-user-info-form / step1_* on sqm-tax-and-cash would churn content-editor configs, readmes, and components.d.ts without runtime benefit — not safe/simple in this port.
• Other residual risks treated as closed for this PR: backend GraphQL (connectionStatus, startImpactConnection, completeImpactConnection) is version-agnostic; COMPLETED cohort short-circuits billing/phone revalidation in getCurrentStep; STARTED auto-complete + skip paths use the PR branching (not master’s create-only connectPartner); overrideNextStep uses correct parentheses (override || (skip ? "/3" : "/2")).

Test plan

• cd packages/mint-components && npx tsc --noEmit (already clean on this branch)
• Widget verification: email → code → partner modal; already-connected users skip modal and see widget content
• Modal submit: startImpactConnection → NOT_STARTED → STARTED, then advance past verification
• Tax/cash step 1: US or no-indirect-tax tenant skips to /3 (or override) via completeImpactConnection when status is STARTED
• Tax/cash step 2 path: non-skip countries still complete/create from indirect-tax form with the same STARTED branching
• Load with STARTED + full billing: useTaxAndCash auto-completes then routes off refreshed user data
• COMPLETED legacy partners: no modal, no forced phone revalidation / step /1
• Visual: modal primary button inherits 1.x Shoelace primary (not 2.x near-black brand tokens)
• After merge: cut 1.x mint release via existing manual v1-mint publish path (not publish-package.yml)