Add WordCensor SE5 plugin

[niksedk]

Summary

Port of the SE4 WordCensor plugin, the third SE5 plugin built on top of `Plugin-Shared` (after AmericanToBritish + BritishToAmerican).

Engine

`WordCensorEngine` replaces the first ~50% of each offensive word with random grawlix characters (`@ # ! ? $ % &`). Optionally wraps the censored word in `…`. Single-word entries from the bundled list are matched case-insensitively as whole words; multi-word phrases (`blow job`, `god damn`) are matched verbatim before the single-word pass.

`BadWords.txt` is the same list the SE4 version shipped (76 entries) — embedded as a resource of the plugin assembly.

UI

Same preview pattern as AmericanToBritish:

• Title + scope summary ("Replace offensive words with grawlix characters (#@!$%) in the X selected line(s)…").
• A list of every affected line — original (muted) above, censored (SemiBold) below, with a checkbox to include/exclude that line and the SRT line number.
• A Highlight censored words in red toggle in the toolbar — the preview re-runs live when the user flips it, so they can see both styles before applying. Preference is persisted via the plugin Settings round-trip.
• Select all / Select none, a "X of Y line(s) selected" summary, Cancel, and an accent-styled Apply (disabled when nothing is checked).
• Empty list ⇒ a centered "No offensive words found in the selected lines." instead of an empty box.
• Theme variant comes from `request.theme` (via Plugin-Shared's `PluginApp`).

Build + index

• `.github/workflows/word-censor.yml` mirrors the other SE5 plugin workflows: matrix self-contained publish for the six supported RIDs, plugin.json rewritten per-platform with the `executables` block, six zips uploaded as artifacts, and a GitHub release on manual dispatch with a tag.
• `se5-plugins.json` extended with a Word censor entry pointing at the planned `se5-word-censor-v1.0` release assets via the per-platform `downloads` map.

Test plan

• CI matrix build passes on all six RIDs.
• After merge, dispatch the workflow with tag `se5-word-censor-v1.0` to publish the release.
• In SE: install via Get plugins online... → run on a subtitle containing some of the bundled bad words → preview lists the affected lines → flip "Highlight in red" to see the <font> wrapping → Apply replaces only the checked ones → status shows count.
• Reopen the plugin — "Highlight in red" remembers its last value.

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