feat: add angular 15 template (#116)

[dalenguyen]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/analogjs/analog/blob/main/CONTRIBUTING.md#-commit-message-guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

Which package are you modifying?

• vite-angular-plugin
• astro-angular
• create-analog
• router

What is the current behavior?

Issue Number: N/A

What is the new behavior?

• Ability to generate Angular 15 template

Does this PR introduce a breaking change?

• Yes
• No

Other information

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[brandonroberts]

🎉

[brandonroberts]

Thanks! @allcontributors add @dalenguyen for code

[allcontributors]

@brandonroberts

I've put up a pull request to add @dalenguyen! 🎉

[teobmg]

Hi @brandonroberts,
I have a question about this: even if the new template has been merged, the vite plugin is still requiring version 14 of the build-angular dependency: https://github.com/analogjs/analog/blob/main/packages/vite-plugin-angular/package.json#L22

Should we open a separate PR for that?

[brandonroberts]

Thanks @teobmg yes you can open a separate PR for that