Move string literals that represent errors to resource files & localize them

See the code near this line: https://github.com/Bardin08/db-seeder/blob/cbeb1098d3a00135238d78cd9fd0a57c96e16bbb/DbSeeder/SqlParser/SyntaxTree/Validation/NodeValidators/AstValidationConstants.cs#L3

Also, look for the number of this issue in the project code base.