feat: Render diffs in email notifications (#4164)

* deps

* diffCompact

* Diffs in email

* test

* fix: Fade deleted images
fix: Don't include empty paragraphs as context
fix: Allow for same image multiple times and refactor

* Remove target _blank

* fix: Table heading incorrect color

shared/styles/theme.ts

@@ -130,7 +130,6 @@ export const light = {
   tableDivider: colors.smokeDark,
   tableSelected: colors.primary,
   tableSelectedBackground: "#E5F7FF",
-  tableHeaderBackground: colors.white,
   buttonNeutralBackground: colors.white,
   buttonNeutralText: colors.almostBlack,
   buttonNeutralBorder: darken(0.15, colors.white),
@@ -188,7 +187,6 @@ export const dark = {
   tableDivider: colors.lightBlack,
   tableSelected: colors.primary,
   tableSelectedBackground: "#002333",
-  tableHeaderBackground: colors.almostBlack,
   buttonNeutralBackground: colors.almostBlack,
   buttonNeutralText: colors.white,
   buttonNeutralBorder: colors.slateDark,