Filter out candidate files with "template" in name

[jberkus]

Currently, if an org names a template file for candidates candidate-template.md then that will appear as if it were a real candidate in the election.

Modify the candidate sorter to screen out these files.

[sumit-158]

Hi, @jberkus I'm kinda new to open source so, can I work on this? Even possible could you help me through it.

[jberkus]

@sumit-158 sure! It should be a relatively easy fix.

The candidates get filtered in https://github.com/elekto-io/elekto/blob/main/elekto/models/meta.py when we pull them from disk. You'd just need to add a regex filter on the names to screen out ones that have the word "template" in them, even if they do have the word "candidate".