feat(macos/swift): support exclude_title/exclude_titles natively in Swift binary

[TimeToBuildBob]

Context

Follow-up from #120 (per @ErikBjare's request). PR #120 adds a fallback to JXA when exclude_title/exclude_titles are configured, but the proper fix is to support title filtering natively in the Swift binary so users don't have to fall back to the slower JXA strategy.

Current behavior: The Swift binary (aw-watcher-window-macos) sends heartbeats directly to the AW server, bypassing all Python filtering. When exclude_title or exclude_titles is set, the watcher has to fall back to JXA (Python-based) to apply the filters.

Desired behavior: The Swift binary should read exclude_title/exclude_titles from the config and filter window titles before sending heartbeats to the server.

Possible approaches

1. Pass filter config to Swift binary via CLI args or a temp config file
2. Read aw-watcher-window.toml directly in Swift (the config file format is simple TOML)
3. Post-filter in Python — have the Swift binary output events to stdout instead of posting directly, then filter in Python before sending (larger refactor)

Option 2 seems cleanest — the Swift binary already has access to the config dir path.

Related

• fix(macos): fall back to jxa when exclude_title/exclude_titles configured #120 — JXA fallback workaround (currently open)
• aw-watcher-window's exclude_title, exclude_titles config setting does not work for macOS activitywatch#1141 — Original report

[ErikBjare]

I think 3 makes sense? Or 1, not sure we want to start involving the subprocess in config parsing.