Station Anchor (#26098)

* Work on abstracting out chargeup functionality/ui from grav gen

* Work on station anchor

* Finish implementing station anchors

* uhh yeah

* ok.

* fix tests

* whoops

* Get the last extraneous yaml fail

* PJB review

* beast mode... ACTIVATE!

---------

Co-authored-by: Ed <96445749+TheShuEd@users.noreply.github.com>
Co-authored-by: EmoGarbage404 <retron404@gmail.com>

Content.IntegrationTests/Tests/GravityGridTest.cs

@@ -21,6 +21,9 @@ namespace Content.IntegrationTests.Tests
   id: GridGravityGeneratorDummy
   components:
   - type: GravityGenerator
+  - type: PowerCharge
+    windowTitle: gravity-generator-window-title
+    idlePower: 50
     chargeRate: 1000000000 # Set this really high so it discharges in a single tick.
     activePower: 500
   - type: ApcPowerReceiver