docs/examples: enhancements (#1572)

* docs: re-order sections

* fix references

* Add mixtral-instruct, tinyllama-chat, dolphin-2.5-mixtral-8x7b

* Fix link

* Minor corrections

* fix: models is a StringSlice, not a String

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

* WIP: switch docs theme

* content

* Fix GH link

* enhancements

* enhancements

* Fixed how to link

Signed-off-by: lunamidori5 <118759930+lunamidori5@users.noreply.github.com>

* fixups

* logo fix

* more fixups

* final touches

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Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Signed-off-by: lunamidori5 <118759930+lunamidori5@users.noreply.github.com>
Co-authored-by: lunamidori5 <118759930+lunamidori5@users.noreply.github.com>