Converters: Support for exporting to Civs Format

[julien-boudry]

See: andrewcmyers/civs#58

[andrewcmyers]

Looks very useful, but probably you need some test cases to cover CIVS weight specifications?

[julien-boudry]

Condorcet support quantifier. And optionally support weight if activated.

Quantifiers are always converted to multiple vote lines (we don't support the Civs quantifier).
Weight, if activated, is converted to a multiple-vote line.

You can see the quantifier test here: (l.22)

Condorcet/Tests/src/Tools/Converters/CivsFormatTest.php

Line 22 in 43b3ab4

public function testSimple(): void

You can see the weight test here: (l.87)

Condorcet/Tests/src/Tools/Converters/CivsFormatTest.php

Line 87 in 43b3ab4

public function testWeight(): void