feat: InputPassword + FieldPassword composition

[isaquebock]

Summary

Introduce @aziontech/webkit/inputs/input-password and its form-field wrapper @aziontech/webkit/inputs/field-password.

InputPassword

• Single-line password input with the same visual language as InputText v2 (same border, focus ring, disabled tokens). Single fixed height of 40px (large only).
• Built-in visibility toggle button on the trailing edge (driven by the existing IconButton). The native type flips between password and text via local state; the toggle announces its state via aria-pressed.
• Props: modelValue, placeholder, maxLength, disabled, readonly, required, invalid, toggleable, autocomplete ('current-password' | 'new-password' | 'off').
• Slots: iconLeft (always available), iconRight (only honored when toggleable=false).
• Ships the input-password.figma.ts Code Connect mapping.

FieldPassword

• Mirrors FieldText: composes Label + InputPassword + HelperText with the same useId()-backed wiring for for / id / aria-describedby.
• Forwards iconLeft / iconRight slots and adds password-specific props (maxLength, toggleable, autocomplete).
• Default disabled-fallback helper copy: 'This field is locked.'.

Storybook templates

Stories use the v-model Template pattern documented in the storybook-write skill (PR #643) — local ref + watch + onUpdate, so the toggle has a value to reveal and the Actions panel still receives update:modelValue events.

Stacking

Base is feat/inputs-text-v2-and-field (PR #648) so the diff stays focused on the password work. When the upstream PRs merge into main, this branch rebases against main and the base auto-narrows.

Blocked by, in order:

• feat: dim focus ring color to reduce visual weight #644 — feat: dim focus ring color
• feat: add Label input primitive #645 — feat: add Label input primitive
• feat: add HelperText input primitive #646 — feat: add HelperText input primitive
• feat: InputText v2 + FieldText composition #648 — feat: InputText v2 + FieldText composition

Test plan

• pnpm --filter @aziontech/webkit lint — clean.
• Storybook → Webkit/Inputs/InputPassword → Default, Toggle, IconLeft, Filled, Invalid, MaxLength, Disabled render.
• Storybook → Webkit/Inputs/FieldPassword → Default, Required, Invalid, Disabled, Toggle, Icons render.
• Type a value, click the eye icon, confirm the text is revealed (regression check for the bug fixed during planning).
• Tab to the trigger → Tab again moves to the toggle button → Enter/Space flips visibility → aria-pressed updates.