SSG: Handling wildcards, path params, regexp routing

[yusukebe]

What is the feature you are proposing?

If the following routing is used, an unexpected file will be generated.

app.get('/shops/:id', (c) => c.html(''))
app.get('/shops/:id/:comments{[0-9]+}', (c) => c.html(''))
app.get('/foo/*', (c) => c.html(''))

If we don't specify the URL to access with a feature like ssgParams, we can ignore the generation of these files.

[yusukebe]

Fixed by #1990