### Summary
- Change generated topdata wiki links to target public wiki namespace and canonical slug paths.
- Add generated public path metadata to wiki page generation and page-index output.
- Add YAML-driven generated slug overrides and public-target collision validation.
### Details
- Generated relation links now render public targets such as:
- `[[feat/hardiness-vs-enchantments|Hardiness vs. Enchantments]]`
- `[[feat/favored-enemy-elves|Favored Enemy: Elves]]`
- Topdata page IDs remain the internal identity for output layout, managed markers, deploy state, and bookkeeping.
- Generated managed markers now include the effective public slug:
- `<!-- sow-topdata-wiki:page=... wiki_slug=... -->`
- Page-index entries now include:
- `public_slug`
- `public_target`
- Added parsing and validation for `page_paths.slug_overrides` from `topdata/wiki/wiki.yaml`.
- Generated public targets are validated for duplicate namespace-local collisions.
- Table link helpers now derive public targets from target page titles when available, so display aliases do not accidentally change link destinations.
### Tests
- Added and updated coverage for:
- public target rendering
- marker `wiki_slug` output
- page-index public metadata
- duplicate generated public target rejection
- slug override parsing and validation
- override-driven target selection
- target title slugging independent of display labels
### Validation
- `go test ./...`
- `gofmt -w` on changed Go files
- `./build-tool.sh`
- `git diff --check`
Reviewed-on: https://gitea.westgate.pw/ShadowsOverWestgate/sow-tools/pulls/6
Co-authored-by: vickydotbat <vickydotbat@tutamail.com>
Co-committed-by: vickydotbat <vickydotbat@tutamail.com>
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