[gh315] Support Phoenix 1.7.x

[andyduong1920]

closes https://github.com/nimblehq/elixir-templates/issues/gh315

What happened 👀

Support Phoenix 1.7.1

Insight 📝

The template could be applied to the Phoenix 1.7.1 project now. The newly generated app's codebase is falling, aside from that, we have disabled some addons, we will need to enable them again

• [ ] Enable the Bootstrap addon -> The Bootstrap addon will remove all pre config TailwindCSS
• [ ] Enable the ErrorView addon for API as the View is changed in Phoenix 1.7.1 -> Need to visit the new View system in Phoenix 1.7
• [x] Enable the SVGIcon -> Use the Veririef route structure handled by Liam in https://github.com/nimblehq/elixir-templates/pull/320

Proof Of Work 📹

The CI is passed