Remove title slug check and test duplicate titles (#116)

## Summary
- Remove `docs-check-titles` pre-commit hook and mise task — wiki-links resolve by filename stem, not frontmatter title, so slug-format titles and uniqueness aren't needed
- Add two test cards (`title-test-alpha`, `title-test-beta`) with identical `title: Title Test Card` to verify duplicate titles don't break Quartz or obsidian.nvim
- Retitle `index.md` from `blumeops-documentation` to `BlumeOps`
- Add GitHub and Forgejo repo links to homepage intro

## Test plan
- [ ] Deploy to docs site and verify both test cards render and cross-link correctly
- [ ] Verify homepage title renders as "BlumeOps"
- [ ] Verify repo links on homepage work
- [ ] After confirming, remove test cards in a follow-up

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/116

docs/reference/infrastructure/title-test-alpha.md

@@ -0,0 +1,13 @@
+---
+title: Title Test Card
+tags:
+  - infrastructure
+  - test
+---
+
+# Title Test Card (Alpha)
+
+This card tests that duplicate frontmatter titles don't break wiki-link resolution.
+This card and [[title-test-beta]] share the same `title:` frontmatter value.
+
+If you can read both cards and the links work, the test passes.

docs/reference/infrastructure/title-test-beta.md

@@ -0,0 +1,13 @@
+---
+title: Title Test Card
+tags:
+  - infrastructure
+  - test
+---
+
+# Title Test Card (Beta)
+
+This card tests that duplicate frontmatter titles don't break wiki-link resolution.
+This card and [[title-test-alpha]] share the same `title:` frontmatter value.
+
+If you can read both cards and the links work, the test passes.