feat: Specify the different entry file rather than index.md

[g4rry420]

Signed-off-by: GurkiranSingh [email protected]

User can specify different entry rather index.md by using the entry config option. Please, let me know if you see any issues :)
Resolves: #280

[brc-dd]

Yeah but this logic won't work when someone is deploying their site. It only works with our custom server which is only suitable for previewing the website locally after build. The servers specifically need index.html to be present. That being said, we need to build entry as if it was index.md (and emit index.html).

VuePress has probably done this using their permalink feature, which is still missing in VitePress.

[g4rry420]

I agree, I was worried by this too. I will look into VuePress implementation for this.

[g4rry420]

@brc-dd If user specifies the different entry file other than index, then I am emitting index.html file, however, the entry file js chunk remained the same name, which shouldn't be a problem as we are only importing it in the index file.
Also, if user wants to add link to the entry page, then they will have to point to index file only, otherwise it will result in deadlinks.
Please, let me know if you see any issues :)