feat(router): overhaul route discovery engine

[markostanimirovic]

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-plugin-angular
• vite-plugin-nitro
• astro-angular
• create-analog
• router
• platform
• content
• nx-plugin
• trpc

What is the current behavior?

• It's not possible to create named nested pages without a parent (layout) page.
• Creating pages within the pathless directory and pathless layouts are not supported.

Closes #237, #273

What is the new behavior?

• We can create named nested routes without a layout route.

/pages
  /blog
    posts.page.ts

• We can create pages within the pathless directories.

/pages
  /(auth)
    login.page.ts
    signup.page.ts

• We can define the layout page for pages within the pathless directory.

/pages
  /(auth)
    login.page.ts
    signup.page.ts
  (auth).page.ts

• We can create nested wildcard routes:

/pages
  /blog
    posts.page.ts
    [...blog-not-found].md
  blog.page.ts
  index.page.ts
  [...not-found].md

Does this PR introduce a breaking change?

• Yes
• No

[optional] What gif best describes this PR or how it makes you feel?

EDIT: 😅

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[zawasp]

Does this by any chance also fix #412 ?

[matheo]

@markostanimirovic the router-discovery doesn't support two levels of nesting right?
I was trying to do this:

pages/
└── admin/
    └── entity/
            ├── add.page.ts
            └── (list).page.ts

I just started to try analogjs and I came with the expectation of infinite nesting 😅
but now I realize that once inside a subfolder I have to use the dot notation in the inner filenames.

[matheo]

@brandonroberts it would be nice to have a command printing the detected routes somehow,
I tried to check the generated code with no luck

[brandonroberts]

@matheo routing nested in folders is supported. What do you mean by using dot notation inside nested folders? Any file with a .page.ts extension should be picked up.

You can log the routes

import { routes } from '@analogjs/router';

console.log(routes);