feat: Add Discord alert webhook, ContactCategory enum, form request

- Added Discord alert webhook URL to .env.example
- Created ContactCategory enum with humanReadable method
- Implemented ContactSubmissionRequest form request
- Added ContactSubmission model with fillable and casts properties
- Included configurations for Discord alerts and honeypot protection

config/honeypot.php

@@ -0,0 +1,66 @@
+<?php
+
+use Spatie\Honeypot\SpamResponder\BlankPageResponder;
+
+return [
+    /*
+     * This switch determines if the honeypot protection should be activated.
+     */
+    'enabled' => env('HONEYPOT_ENABLED', true),
+
+    /*
+     * Here you can specify name of the honeypot field. Any requests that submit a non-empty
+     * value for this name will be discarded. Make sure this name does not
+     * collide with a form field that is actually used.
+     */
+    'name_field_name' => env('HONEYPOT_NAME', 'my_name'),
+
+    /*
+     * When this is activated there will be a random string added
+     * to the name_field_name. This improves the
+     * protection against bots.
+     */
+    'randomize_name_field_name' => env('HONEYPOT_RANDOMIZE', true),
+
+    /*
+     * When this is activated, requests will be checked if
+     * form is submitted faster than this amount of seconds
+     */
+    'valid_from_timestamp' => env('HONEYPOT_VALID_FROM_TIMESTAMP', true),
+
+    /*
+     * This field contains the name of a form field that will be used to verify
+     * if the form wasn't submitted too quickly. Make sure this name does not
+     * collide with a form field that is actually used.
+     */
+    'valid_from_field_name' => env('HONEYPOT_VALID_FROM', 'valid_from'),
+
+    /*
+     * If the form is submitted faster than this amount of seconds
+     * the form submission will be considered invalid.
+     */
+    'amount_of_seconds' => env('HONEYPOT_SECONDS', 2),
+
+    /*
+     * This class is responsible for sending a response to requests that
+     * are detected as being spammy. By default a blank page is shown.
+     *
+     * A valid responder is any class that implements
+     * `Spatie\Honeypot\SpamResponder\SpamResponder`
+     */
+    'respond_to_spam_with' => BlankPageResponder::class,
+
+    /*
+     * When activated, requests will be checked if honeypot fields are missing,
+     * if so the request will be stamped as spam. Be careful! When using the
+     * global middleware be sure to add honeypot fields to each form.
+     */
+    'honeypot_fields_required_for_all_forms' => false,
+
+    /*
+     * This class is responsible for applying all spam protection
+     * rules for a request. In most cases, you shouldn't change
+     * this value.
+     */
+    'spam_protection' => \Spatie\Honeypot\SpamProtection::class,
+];