CFG: added lq_default.cfg to get around vkquake pak'd cfg

[lavenderdotpet]

Description of Changes

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thank you j4reporting for the suggestion here Novum/vkQuake#820 (comment)

added clone of default.cfg (lq_default.cfg) to get around engines pak'd cfgs overwriting librequakes

Visual Sample

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Checklist

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• I have read the LibreQuake contribution guidelines
• I have thoroughly tested my changes to the best of my ability
• I confirm I have not contributed anything that would impact LibreQuake's licensing and usage
• This Pull Request fixes a critical issue that should be reviewed and merged as soon as possible

[j4reporting]

better rename default.cfg to lq_default.cfg instead of duplicating the file?

[lavenderdotpet]

default.cfg might still be needed for mods that have a quake.rc but no default.cfg

[lavenderdotpet]

better rename default.cfg to lq_default.cfg instead of duplicating the file?

tho it might be better to handle having a 2nd one via the build script rather then having to make sure both are synced in the repo

[j4reporting]

how about this:

mv default.cfg  lq_default.cfg
echo 'exec lq_default.cfg'  > default.cfg

and in quake.rc exec lq_default.cfg