feat: open local files via Quick Open in remote SSH sessions

[j4rviscmd]

Summary

Adds the ability to open local files via Quick Open (Ctrl/Cmd+P) while connected to a remote (SSH) workspace.

Background

In a remote SSH session, Quick Open resolves absolute paths against the remote filesystem (vscode-remote://), so typing a local path like /Users/... either failed or opened the remote-side file. This made it impossible to open local files without disconnecting.

Changes

• New setting coderm.quickOpen.localFiles (default: true)
• anythingQuickAccess.ts: new method getLocalAbsolutePathFileResults resolves the typed absolute path as a local file:// URI and stats it via the always-registered DiskFileSystemProvider (registered in the renderer even in remote sessions)
• getFilePicks now resolves both remote and local absolute-path candidates in parallel (Promise.all) with dedup — both show up as Quick Open candidates
• No-op in local (non-remote) sessions to avoid duplicate candidates
• README updated (EN + JA)

Notes

• Uses the local OS path lib (OS/posix/win32), not the remote one, to decide whether the query is an absolute path on the client machine
• quickOpenLocalFiles.ts follows the existing quickOpenIncludeTerminals.ts pattern (configuration-only registration) to keep the fork diff localized

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