Crawling Fixes 1: Dragons and Borgs can't do the worm. (#39084)

* Init Commit

* Remove unused code, fix stun visuals bug

* Update Content.Shared/Stunnable/SharedStunSystem.cs

* Some initial changes

* first batch of changes

* Commit

* One line cleanup

* KnockdownStatusEffect ain't worth it.

* Fix 2 bugs

* Fixes

* Remove that actually,

* Commit

* Better solution

* Alright final commit I think

* Add better remarks

* How the fuck did this not get pushed???

* Wait no why was my ryder trying to push that??? I didn't make that change! DON'T DO THAT!!!

* Review

* Don't log that

---------

Co-authored-by: Princess Cheeseballs <66055347+Pronana@users.noreply.github.com>
Co-authored-by: ScarKy0 <106310278+ScarKy0@users.noreply.github.com>

Content.Shared/Stunnable/CrawlerComponent.cs

@@ -0,0 +1,40 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Stunnable;
+
+/// <summary>
+/// This is used to denote that an entity can crawl.
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState, Access(typeof(SharedStunSystem))]
+public sealed partial class CrawlerComponent : Component
+{
+    /// <summary>
+    /// Default time we will be knocked down for.
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public TimeSpan DefaultKnockedDuration { get; set; } = TimeSpan.FromSeconds(0.5);
+
+    /// <summary>
+    /// Minimum damage taken to extend our knockdown timer by the default time.
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public float KnockdownDamageThreshold = 5f;
+
+    /// <summary>
+    /// Time it takes us to stand up
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public TimeSpan StandTime = TimeSpan.FromSeconds(2);
+
+    /// <summary>
+    /// Base modifier to the maximum movement speed of a knocked down mover.
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public float SpeedModifier = 0.4f;
+
+    /// <summary>
+    /// Friction modifier applied to an entity in the downed state.
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public float FrictionModifier = 1f;
+}