Add migration to increase Motion coverage

[lgriffee]

Write a new @shopify/polaris-migrator script to increase Motion coverage. The migration should walk the following declaration and apply passing values.

{
    "@keyframes",
    "transition:",
    "transition-delay:",
    "transition-property:",
    "transition-duration:",
    "transition-timing-function:",
    "animation:",
    "animation-delay:",
    "animation-direction:",
    "animation-duration:",
    "animation-fill-mode:",
    "animation-iteration-count:",
    "animation-name:",
    "animation-play-state:",
    "animation-timing-function:",
}

Failing lines

Review failures and determine what is possible to migrate:

• Note values that are easily replaced
• Otherwise, discuss replacement values with team

Data

• 👉 motion failing lines grouped by property
• failing-lines-all.json
• failing-lines-categorized.json
• grouped-failing-lines-categorized.json
• sorted-failing-lines-categorized.json

[jesstelford]

Work has begun in the migration-motion branch.