Change reference links to inline

doc/development/code_review.md

doc/development/emails.md

doc/development/fe_guide/accessibility.md

doc/development/fe_guide/axios.md

doc/development/fe_guide/graphql.md

doc/development/fe_guide/icons.md

doc/development/fe_guide/index.md

doc/development/fe_guide/performance.md

doc/development/fe_guide/security.md

doc/development/fe_guide/style/scss.md

doc/development/fe_guide/style/vue.md

doc/development/fe_guide/vuex.md

doc/development/new_fe_guide/development/accessibility.md

doc/development/repository_mirroring.md

doc/development/secure_coding_guidelines.md

doc/development/testing_guide/testing_levels.md