feat(frontend): Rename standard for EXT tokens

[AntonioVentilii]

Motivation

We are going to transform the standard field of a Token type from an enum to an object (so that we can extend it with other fields like version or subStandards).

So, we can simply define the standard of EXT tokens as ext and specify the version after.

[Copilot]

Pull request overview

This PR renames the EXT token standard from 'extV2' to 'ext' across the frontend codebase. This change prepares for a future refactoring where the standard field will be transformed from an enum to an object, allowing for additional fields like version or subStandards.

Key Changes

• Updated token standard definition from 'extV2' to 'ext' in the schema
• Renamed utility functions from isTokenExtV2/isTokenExtV2CustomToken to isTokenExt/isTokenExtCustomToken
• Updated all references to the standard value and utility functions across test files and implementation code

Reviewed changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/frontend/src/lib/schema/token.schema.ts	Changed token standard enum value from 'extV2' to 'ext'
src/frontend/src/icp/utils/ext.utils.ts	Renamed utility functions isTokenExtV2 → isTokenExt and isTokenExtV2CustomToken → isTokenExtCustomToken, updated standard value in mapExtToken
src/frontend/src/icp/utils/token.utils.ts	Updated import and usage of renamed isTokenExt function
src/frontend/src/icp/utils/ic-send.utils.ts	Updated import and usage of renamed isTokenExt function
src/frontend/src/icp/services/nft-send.services.ts	Updated import and usage of renamed isTokenExt function
src/frontend/src/icp/services/ext.services.ts	Updated standard value from 'extV2' to 'ext' in token mapping
src/frontend/src/lib/utils/tokens.utils.ts	Updated import and two usages of renamed isTokenExt function
src/frontend/src/lib/utils/nft.utils.ts	Updated import and two usages of renamed isTokenExt function
src/frontend/src/lib/stores/default-tokens.store.ts	Updated import and usage of renamed isTokenExt function
src/frontend/src/lib/stores/custom-tokens.store.ts	Updated import and usage of renamed isTokenExt function
src/frontend/src/lib/services/nft.services.ts	Updated import and usage of renamed isTokenExtCustomToken function
src/frontend/src/lib/components/tokens/EnableTokenToggle.svelte	Updated import and usage of renamed isTokenExtCustomToken function
src/frontend/src/tests/mocks/ext-tokens.mock.ts	Updated mock token standard values from 'extV2' to 'ext'
src/frontend/src/tests/lib/stores/custom-tokens.store.spec.ts	Updated test mock standard value from 'extV2' to 'ext'
src/frontend/src/tests/lib/schema/token.schema.spec.ts	Updated test mock standard value from 'extV2' to 'ext'
src/frontend/src/tests/icp/utils/ext.utils.spec.ts	Renamed test suite and updated imports/usages of renamed functions and standard values
src/frontend/src/tests/icp/services/ext.service.spec.ts	Updated test mock standard values from 'extV2' to 'ext'
src/frontend/src/tests/icp/services/ext-add-custom-tokens.service.spec.ts	Updated test mock standard value from 'extV2' to 'ext'
src/frontend/src/tests/icp/schema/ext-token.schema.spec.ts	Updated test mock standard value from 'extV2' to 'ext'

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