add "base" option & fix paths containing spaces

[7frank]

• Adds option "base" to allow to define astro#base

  import { defineConfig } from "astro/config";
  const base="/ai-ui-playground"
  export default defineConfig({
  base,
  markdown: {
  rehypePlugins: [()=>rehypeAstroRelativeMarkdownLinks({base})]
  }
  // ...
  })

• Extends functionality to support relative links in the form of [Title](./My%20File.md) or [Title](./My File.md)

  • replacing escaped characters with spaces to be able to find files on disk
  • replacing whitespace with "slash" to be in sync with astro router

[vernak2539]

hey @7frank! thanks for the contribution. I've made the latest commit to update a few things. These include:

1. Changing the location where the URL is decoded (and how - unescape is depcreated, so used decodeURI)
2. Commented out some code
   • I'll comment on the code with some questions I have!

I've also added a test to understand what this functionality will provide, which we may want to update in the near future

[vernak2539]

Side note, you can use the astro config like below instead of using a function

import { defineConfig } from "astro/config";
const base="/ai-ui-playground"
export default defineConfig({
  base,
  markdown: {
-    rehypePlugins: [()=>rehypeAstroRelativeMarkdownLinks({base})]
+    rehypePlugins: [[rehypeAstroRelativeMarkdownLinks, {base}]]
  }
// ...
})

[vernak2539]

Hey @7frank, I'm going to remove the "base" functionality for now in order to get the normalisation of the URL path merged.

I'll come back to this once I have a bit more time to look at the docs and play around with it a bit more! Feel free to open another PR if you'd like. Tracked in https://github.com/vernak2539/astro-rehype-relative-markdown-links/issues/7.

[vernak2539]

Released in v0.6.1