Upload API — Localization export and import

[MariusStorhaug]

Parent: #4

Delivers functions for exporting and importing localization data for CurseForge projects. This is a niche feature primarily used by World of Warcraft addon authors for managing localized strings.

Acceptance criteria:

• Export-CurseForgeLocalization exports localization data with full parameter support (ExportType, Language, Unlocalized handling, TableName, Namespaces, etc.)
• Import-CurseForgeLocalization imports localization data via JSON payload
• Missing phrase handling options supported: DoNothing, DeleteIfNoTranslations, DeleteIfTranslationsOnlyExistForSelectedLanguage, DeletePhrase
• Unit tests cover parameter serialization and response parsing

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Endpoints:

Function	Method	Path
Export-CurseForgeLocalization	GET	/api/projects/{projectId}/localization/export
Import-CurseForgeLocalization	POST	/api/projects/{projectId}/localization/import

Export parameters:

Parameter	Values	Default
ExportType	Table, TableAdditions, GlobalStrings	TableAdditions
Language	enUS, deDE, esES, etc.	enUS
Unlocalized	ShowPrimary, ShowPrimaryAsComment, ShowBlankAsComment, Ignore	ShowPrimary
TableName	any string	L
EscapeNonAsciiCharacters	bool	false
TrueIfValueEqualsKey	bool	false
ConcatenateSubNamespaces	bool	false
Namespaces	comma-delimited names	Base Namespace

Import payload:

{
    "metadata": {
        "language": "enUS",
        "namespace": "toc",
        "formatType": "TableAdditions",
        "missing-phrase-handling": "DoNothing"
    },
    "localizations": "string content to import"
}

Blocked by: #11 (needs Upload API client)

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Sub-issues

See linked Tasks below.