Fill latest.xml with apps' latest versions and release URLs

[BinToss]

SPV3 is the most important, followed by HXE, and then Eaxir.
A few things need to be done before we have the versions and URLs needed to close this Issue.

• Fill SPV3 latest version metainfo
  • Version: Determine with standardized rules. SemVer and Conventional Commits are preferable.
    • Build Number: This will need to be offset by the original build number before I stopped updating it. After that commit, rely on filtered commit changes to determine whether a build was significant or insignificant. A significant build is one triggered by a push containing commits that affect code, resources, or the build process itself. Significant builds bump the build version.
  • URL: TBD by the Release workflows.
• Fill HXE latest version metainfo
  • Version: (see SPV3 Version)
    • Build Number: (see SPV3 Build Number)
  • URL: TBD by the Release workflows.
• Fill Eaxir latest version metainfo
  • Version: (Needs investigation)
    • Build Number: (Needs investigation)
  • URL: TBD by the Release workflows. Currently, Eaxir does not have a Release workflow.