Corrected various typos and weak writing

• New changelog page

• (Editions) French translation of the Executive Summary

• (Introduction) Streamlined The Problem and The Solution by cutting out repeated points

• (Phase 0) Streamlined Introduction of Phase 0 by cutting out repeated points

• (Phase 0) Rephrased explanations of Phase 0 conditions to remove references to implementation details

• (Phase 0) Restructured policies in Phase 0 with the removal of the objective subsection, a new precedents subsection, and rationales about the policy, not the condition