web: add Cloudflare redirects

apps/website/static/_redirects

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+/behavioral-questions /behavioral-interview-questions/
+/behavioral-questions/ /behavioral-interview-questions/
+/cheatsheet /coding-interview-cheatsheet/
+/cheatsheet/ /coding-interview-cheatsheet/
+/coding-interview-best-practices /coding-interview-cheatsheet/
+/coding-interview-best-practices/ /coding-interview-cheatsheet/
+/study-and-practice /coding-interview-study-plan/
+/study-and-practice/ /coding-interview-study-plan/
+/coding-signals /coding-interview-rubrics/
+/coding-signals/ /coding-interview-rubrics/
+/coding-interview /coding-interview-prep/
+/coding-interview/ /coding-interview-prep/
+/introduction /software-engineering-interview-guide/
+/introduction/ /software-engineering-interview-guide/
+/psychological-tricks /software-engineering-interview-guide/
+/psychological-tricks/ /software-engineering-interview-guide/
+/picking-a-language /programming-languages-for-coding-interviews/
+/picking-a-language/ /programming-languages-for-coding-interviews/
+/questions-to-ask /final-questions/
+/questions-to-ask/ /final-questions/
+/resume/:blah* /resume/
+/resume-checklist /resume/
+/resume-checklist/ /resume/
+/star-format /behavioral-interview/
+/star-format/ /behavioral-interview/
+/interview-formats /software-engineering-interview-guide/
+/interview-formats/ /software-engineering-interview-guide/
+/coding-round-overview /coding-interview-prep/
+/coding-round-overview/ /coding-interview-prep/
+/behavioral-round-overview /behavioral-interview/
+/behavioral-round-overview/ /behavioral-interview/
+/during-coding-interview /coding-interview-cheatsheet/
+/during-coding-interview/ /coding-interview-cheatsheet/
+/algorithms/introduction /algorithms/study-cheatsheet/
+/algorithms/introduction/ /algorithms/study-cheatsheet/
+/algorithms/algorithms-introduction /algorithms/study-cheatsheet/
+/algorithms/algorithms-introduction/ /algorithms/study-cheatsheet/