Replace readme token replacement with the Readme package

This completes the move of that feature to the general-purpose and SDK Pack-compatible package for this purpose.

See https://github.com/devlooped/readme

fix: ensure NuGetizer dogfooding package is always produced by CI pac…

…k + sleet (#728)

The recent self-pack robustness changes (see #1878 / 1894e2f) caused the
late Pack delegator in Directory.targets to override the NuGetizer engine's
Pack target even when NuGetize=true. Consequently 'dotnet pack' (the step
used by both build.yml and publish.yml) produced no .nupkg in bin/, so the
sleet push step saw an empty/missing bin directory and logged
'No packages found' (https://github.com/devlooped/nugetizer/actions/runs/28137348651/job/83326971793).

Changes:
* Move the Pack delegator Target declaration *before* the conditional
  <Import> of NuGetizer.targets (the engine) inside Directory.targets.
  When NuGetize=true the engine's Pack definition is declared later and
  therefore wins. When NuGetize is not true the delegator wins and
  redirects the build into the NuGetize=true path (preserving the
  PackFolder=build layout fix).
* Guard the XmlPoke of NuGetizer.Version.props with an
  Exists() condition so a clean pack doesn't hard-fail before the
  pre-build in CI has populated the copied build assets.

Result: the windows '📦 pack' step now reliably emits
NuGetizer.*.nupkg into bin/, and the '🚀 sleet' step receives real
packages to publish to the dogfood feed.

Bump Markdig from 1.1.3 to 1.3.0

---
updated-dependencies:
- dependency-name: Markdig
  dependency-version: 1.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

⬆️ Bump files with dotnet-file sync

# devlooped/oss

- Enable package pruning in Directory.Build.props devlooped/oss@0ff8b7b
- Update create-pull-request action to version 8 devlooped/oss@0662872

Bump Microsoft.Build from 17.13.9 to 17.14.28

---
updated-dependencies:
- dependency-name: Microsoft.Build
  dependency-version: 17.14.28
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

⬆️ Bump files with dotnet-file sync

Move OSMF section closer to the top in package

Specify configration in pack command

Fix markdown link replacement: use raw URLs, preserve tooltips, and h…

…andle absolute URLs correctly (#655)

* Initial plan

* Fix markdown link replacement: use raw URLs, preserve tooltips, and handle absolute URLs correctly

Co-authored-by: kzu <169707+kzu@users.noreply.github.com>

* Use raw.githubusercontent.com format for GitHub raw content URLs

Co-authored-by: kzu <169707+kzu@users.noreply.github.com>

* Apply dotnet-format

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: kzu <169707+kzu@users.noreply.github.com>
Co-authored-by: Daniel Cazzulino <daniel@cazzulino.com>

License acceptance should be required now

So users can read the OSMF EULA