Allow compiling forms directly

[alekseysotnikov]

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PR #808

Is your feature request related to a problem? Please describe.
When compiling Datastar expressions server-side (typically 1-5 line snippets for signal binding, element manipulation, and action invocation), compile-string* currently only accept strings.

The goal is to compile these expressions server-side while maintaining 60fps page server-side rendering. The roundtrip model (compile all snippets at macros compile time) is acceptable for static compositions, but wasteful when runtime composition of multiple dynamic snippets is needed - forcing unnecessary stringification of forms adds compute overhead that impacts SSR performance.

Describe the solution you'd like
Allow compile* and transpile* to accept either:

• A string (current behavior, parsed via read-forms)
• Clojure forms (pass directly)

Describe alternatives you've considered

• Pre-serializing snippets at compile time - loses flexibility for dynamic composition

Additional context
Datastar expressions are snippets like: https://github.com/outskirtslabs/datastar-expressions#example-usage

Expressions compose example:

(let [x (d*js (.. evt -target -value))
                   num 55
                   y (d*js (+ ~num ~x))]
                 (d*js (set! $signal ~y)
                       (set! $other-signal "no")))

Also a comment about API limitation outskirtslabs/datastar-expressions#18 (comment)

[borkdude]

Fixed on main