feat: introducing support for more syntaxes + a way to onboard new syntaxes

[flamestro]

What changed

• introducing a way to add new syntaxes that are not included by syntect by default. Similar to bat
• introduced new workflows for releasing updates

Why

• feature request for clojure support (clojure was already supported by syntect, but it was not enabled by default in deff, now we support everything that syntect supports and add some new syntaxes on top) [Feature] Syntax highlighting for more languages #6
• also changing the workflows in this PR to allow creating version updates in a standardized way.

User-facing impact

• more syntaxes are supported + can be onboarded

Validation

• cargo check --locked
• Manual testing completed (if applicable)

Checklist

• PR is focused and scoped to one change
• Docs updated when behavior changes
• Breaking changes called out (if any)