### Summary
Extend the template variable substitution to replace file paths. This
can be helpful for setting up log files & directories that should match
the repository name.
### PR Changes
- Move files matching glob pattern when setting up repos from template
- For security, added ~escaping~ sanitization for cross-platform support
and to prevent directory traversal (thanks @silverwind for the
reference)
- Added unit testing for escaping function
- Fixed the integration tests for repo template generation by passing
the repo_template_id
- Updated the integration testfiles to add some variable substitution &
assert the outputs
I had to fix the existing repo template integration test and extend it
to add a check for variable substitutions.
Example:
![image](https://github.com/go-gitea/gitea/assets/12700993/621feb09-0ef3-460e-afa8-da74cd84fa4e)