ci: install typos + lychee (Tier-2 quality)

typos (crate-ci): fast Rust-based spell-checker for source + docs
lychee: broken-link checker for markdown + HTML

100% free for public repos. Both run in <1min.

lychee starts with fail=false (warn-only) so first runs don't block
merges if the existing markdown has broken links. Flip to fail=true
after baseline is clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: mastermanas805

.github/workflows/lychee.yml

@@ -0,0 +1,24 @@
+name: lychee (broken links)
+
+on:
+  push:
+    branches: [master, main]
+  pull_request:
+    branches: [master, main]
+  schedule:
+    - cron: '29 6 * * 1'
+
+permissions:
+  contents: read
+  issues: write
+
+jobs:
+  links:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@v4
+      - uses: lycheeverse/lychee-action@v2
+        with:
+          args: --no-progress --max-concurrency 4 --exclude-mail './**/*.md' './**/*.html'
+          fail: false  # warn-only on first install; flip to true once baseline is clean

.github/workflows/typos.yml

@@ -0,0 +1,18 @@
+name: typos
+
+on:
+  push:
+    branches: [master, main]
+  pull_request:
+    branches: [master, main]
+
+permissions:
+  contents: read
+
+jobs:
+  typos:
+    runs-on: ubuntu-latest
+    timeout-minutes: 3
+    steps:
+      - uses: actions/checkout@v4
+      - uses: crate-ci/typos@v1.30.0