refactor: share HTTP status codes across the extension

[EhabY]

Follow-up to #1127 (review: #1127 (comment)).

Summary

• Move HttpStatusCode from websocket/codes to util/httpStatusCode so non-socket code can use it. websocket/codes keeps the WebSocket close codes and builds UNRECOVERABLE_HTTP_CODES from the shared object.
• Replace numeric status literals the extension branches on: authInterceptor, cliManager, loginCoordinator, remote, tasksPanelProvider, filters, plus the matching createAxiosError(...) calls in their tests.
• The reconnect tests iterate UNRECOVERABLE_HTTP_CODES instead of Object.values(HttpStatusCode), since the shared object now also holds statuses that do reconnect.

Left as literals: the status-class ranges in httpRequestsTelemetry (bucket bounds, not specific statuses), mock response shapes and cliManager harness responses in tests, and text that mirrors real output.

Why not axios's HttpStatusCode

axios exports a TS enum, and typescript/no-unsafe-enum-comparison (enabled in .oxlintrc.jsonc) rejects comparing its members with plain number values, such as download()'s return or unrecoverableHttpStatus. That hit 10 sites. Making those values enum-typed would claim every server status is a known member, so this keeps an as const object, matching WebSocketCloseCode.

Validation

• pnpm test:extension: 2,332 passed, 6 skipped.
• pnpm typecheck, pnpm lint, pnpm format:check pass.

🤖 Generated with Claude Code

[aslilac]

I'm a util/ folder hater but I like the idea lot!

[EhabY]

@aslilac This actually made me re-eval the structure here: #1134

It's a bunch of renames but touches 250 files haha (git maintains the correct history since it sees it as a move)