Add redirects for deleted vision processing articles

Add redirects from the three deleted retroreflective tape articles to the new game-piece-detection.rst article to maintain link compatibility.

Author: jasondaming

source/redirects.txt

@@ -309,3 +309,6 @@
 "docs/software/wpilib-tools/choreo/index.rst" "docs/software/pathplanning/choreo/index.rst"
 "docs/networking/networking-introduction/om5p-ac-radio-modification.rst" "docs/zero-to-robot/step-3/radio-programming.rst"
 "docs/software/driverstation/programming-radios-for-fms-offseason.rst" "docs/zero-to-robot/step-3/radio-programming.rst"
+"docs/software/vision-processing/introduction/target-info-and-retroreflection.rst" "docs/software/vision-processing/introduction/game-piece-detection.rst"
+"docs/software/vision-processing/introduction/identifying-and-processing-the-targets.rst" "docs/software/vision-processing/introduction/game-piece-detection.rst"
+"docs/software/vision-processing/introduction/2017-vision-examples.rst" "docs/software/vision-processing/introduction/game-piece-detection.rst"