feat: add aw-tauri support alongside aw-qt

[TimeToBuildBob]

Summary

This is a clean takeover of #1163 (originally by @0xbrayo), addressing all outstanding review comments. The goal is to keep aw-qt builds intact while adding aw-tauri as a parallel build target with its own CI workflow.

Changes from original PR

All changes from #1163 are included, plus the following fixes addressing review feedback:

Review comments addressed

ErikBjare's inline comment on scripts/package/aw-tauri.iss:

• Renamed app from "ActivityWatch" to "ActivityWatch Tauri" to avoid collision with aw-qt installer (they shared DefaultDirName={autopf}\ActivityWatch)
• Uncommented and set AppVerName to show the proper name in Windows installer
• Removed the -tauri suffix from MyAppVersion (now redundant since the app name includes "Tauri")

Makefile ICON conditional:

• Made aw-qt/media/logo/logo.icns dependency conditional on TAURI_BUILD. When building with Tauri, the aw-qt icon build step is skipped (Tauri uses its own bundled icons).

move-to-aw-modules.sh rsync flags inconsistency:

• Both Wayland and X11 paths now use rsync -a (archive) for consistent behavior
• Extracted shared --exclude flags into a $EXCLUDES variable to reduce duplication
• aw-sync copy is now unconditional (applies to both paths)

README.txt typos:

• "copy it a permanent folder" → "copy it to a permanent folder"
• Capitalized "appimage" → "AppImage", "linux" → "Linux", "rpm"/"deb" → "RPM"/"DEB"

build-tauri.yml and build.yml typo:

• Fixed "Wether" → "Whether" in both workflow files

What this PR keeps from #1163

• Separate build-tauri.yml CI workflow for aw-tauri builds (doesn't affect existing aw-qt build.yml)
• build.yml updated runner versions (ubuntu-24.04, macOS-13, macos-latest, windows-latest)
• aw-tauri and awatcher submodules
• scripts/package/build_app_tauri.sh for macOS app bundle creation
• scripts/package/aw-tauri.iss for Windows installer (with collision fix)
• scripts/package/move-to-aw-modules.sh for Linux module installation
• Makefile conditional for TAURI_BUILD

Test plan

• Verify aw-qt CI (build.yml) still passes without modification
• Verify aw-tauri CI (build-tauri.yml) builds successfully on all platforms
• Verify Windows installer names don't conflict (aw-qt installs to ActivityWatch, aw-tauri installs to ActivityWatch Tauri)

---

Important

Adds support for building ActivityWatch with Tauri alongside Qt, including new CI workflows and packaging scripts.

• Behavior:
  • Adds aw-tauri as a parallel build target to aw-qt with its own CI workflow in build-tauri.yml.
  • Ensures aw-qt builds remain intact.
  • Windows installer for aw-tauri named "ActivityWatch Tauri" to avoid collision with aw-qt.
• CI/CD:
  • Introduces build-tauri.yml for Tauri builds, supporting multiple OS and Python versions.
  • Updates build.yml to include new runner versions and corrects typos.
• Makefile:
  • Conditional inclusion of aw-tauri and awatcher submodules based on TAURI_BUILD and OS.
  • Adjusts PACKAGEABLES to exclude certain modules when TAURI_BUILD is true.
• Scripts:
  • Adds build_app_tauri.sh for macOS app bundle creation.
  • Adds aw-tauri.iss for Windows installer.
  • Updates move-to-aw-modules.sh for module management.
• Misc:
  • Fixes typos in README.txt and workflow files.
  • Updates submodule references in .gitmodules.

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[TimeToBuildBob]

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[TimeToBuildBob]

Superseded by #1209 which has cleaner commits (3 focused commits vs this PR's incremental approach). All review comments from #1163 are addressed there.