Add Android cross-compilation support to CI and publish artifacts

[nbassler]

closes #77

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.39%. Comparing base (c62da12) to head (2b81f08).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #90      +/-   ##
==========================================
+ Coverage   72.33%   75.39%   +3.06%     
==========================================
  Files          38       30       -8     
  Lines        3148     2764     -384     
  Branches      452      396      -56     
==========================================
- Hits         2277     2084     -193     
+ Misses        784      593     -191     
  Partials       87       87              

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[Copilot]

Pull request overview

Adds packaging + CI release workflows so libdedx can be consumed as prebuilt artifacts (notably for Android), and updates the CMake install to support find_package(dedx CONFIG) consumers.

Changes:

• Add Android and Windows GitHub Actions workflows that build/install and upload packaged artifacts on releases.
• Add CMake package export/install support (dedxTargets, dedxConfig.cmake, version file) and make install paths use GNUInstallDirs.
• Extend install smoke testing with an additional CMake-based consumer project.

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
CMakeLists.txt	Adds install/package config generation and build toggles for examples/tests.
src/CMakeLists.txt	Switches to exported targets + GNUInstallDirs install paths; installs dedxTargets.
cmake/dedxConfig.cmake.in	Adds config-mode package file to expose exported targets and a dedx::dedx convenience target.
tests/install_smoke_test.cmake	Adds a CMake-based consumer build/run to validate find_package usage.
tests/install_consumer_cmake/CMakeLists.txt	New minimal CMake consumer project used by the smoke test.
examples/CMakeLists.txt	Aligns install destination with GNUInstallDirs and normalizes formatting.
.github/workflows/build-android.yml	New Android cross-compile workflow producing per-ABI packaged artifacts.
.github/workflows/build-windows.yml	New Windows workflow producing a packaged install tree artifact.
.gitignore	Ignores build-packaging/.

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