Update form documentation for forms default reset behavior (#8512)

* Enhance form documentation for form default reset behavior

* Reorder sections for better progressive disclosure of ideas

* fix typos in form.md

* Normalize MDN links in form.md

* Standardized all Usage headings in form.md to imperative form

* add useOptimistic reference

* Standardize section headings in form.md to imperative form

* revert 'action' prop change

* Enhance form submission documentation by clarifying the use of the `action` prop and its behavior:
- including the handling of `FormData`,
- the necessity of `name` attributes,
- the advantages of using a function over a URL.
- removed redundant information about `e.preventDefault()` for the `action` prop.

* clean up Handling form submission with an action prop

* clean up preserving form values after submission

* update code example for Handling multiple submission types

* Clean up code example for Handling multiple submission types

* update form documentation with more examples of keeping form values after submission

* add useFormStatus to benefits of using Action

* Move reset form section to the bottom of the page and update examples

* updates based on pr feedback

* Enhance form documentation by clarifying the `action` and `method` props, including details on handling form submissions with functions and the implications of using `formAction`. Update examples and caveats for better understanding of form behavior in React.

* small cleanups

* Refine form Action documentation

* update Preserving form values after an Action section based on feedback

* update on onSubmit vs action prop note

* Enhance form documentation by expanding on the use of Server Functions in the `action` prop, including detailed examples for passing extra data and handling form submissions. Clarify the behavior of form elements and their interaction with `FormData`.

* fixing onSubmit link and code example clean up

* remove unneeded hidden items

* Polish form documentation wording

* Restore Transition link in form docs

* Clarify form value preservation examples and guidance

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Co-authored-by: Aurora Scharff <aurora.sofie@gmail.com>

Author: MaxwellCohen