Allow version suffix

[wuan]

This PR should allow using version like 1.0.2-fdroid in order to separate (future) versions built with different flavours.

In this context we should also solve the version name, which is v1.0.1 for example, but F-Droid usually uses 1.0.1.

The related F-Droid configuration is as follows:

...
  - versionName: 1.0.2-fdroid
    versionCode: 304
...
AutoUpdateMode: Version +-fdroid %v
UpdateCheckMode: Tags
...

---

Code Review Checklist

• Description accurately reflects what changes are being made.
• Description explains why the changes are being made (or references an issue containing one).
• The PR appropriately sized.
• New code has enough tests.
• New code has enough documentation to answer "how do I use it?" and "what does it do?".
• Existing documentation is up-to-date, if impacted.

[donpui]

To understand..

1. create tag for release: 1.0.3-fdroid in github
2. this trigger CI, where we set version: name:

"Set version string for release"
        run: echo DESTINY_VERSION=${{ github.ref_name }} >> $GITHUB_ENV
        if: ${{ github.ref_type == 'tag' }}

3. CI generates build with link:
   https://github.com/LeastAuthority/destiny/blob/1.0.3/TERMS.md
   instead of https://github.com/LeastAuthority/destiny/blob/1.0.3-fdroid/TERMS.md
   because according logic, we will split string via separator - and take only first part 1.0.3

However in github valid tag is 1.0.3-froid and it means file is available only
https://github.com/LeastAuthority/destiny/blob/1.0.3-fdroid/TERMS.md, not at https://github.com/LeastAuthority/destiny/blob/1.0.3/TERMS.md

In destiny application, when user clicks on Terms link we provide link to exact file of that version, that Terms version would correlate with app version.

Or maybe I misunderstand something..

[wuan]

The format of the tag is not affected by this change. It would just allow using a version name 1.0.3-fdroid and still. be able to use the per version Terms URL.

[donpui]

But we are ok as long as we don't create tag 1.0.3-fdroid in github tag for releases

[wuan]

A F-Droid release will be triggered with any tag in the format 1.0.3. That -fdroid just will be appended during the build itself.

[donpui]

ok