Fixing broken image links in Card Gallery and adding Immortal filter

chrono.docs/Rule/Chain.md

@@ -0,0 +1,4 @@
+---
+category: Rule
+description: Effects are stacked until they are able to be resolved. This enables [[Immediate]] and [[Fast]] reactions to be added onto the stack for reactive gameplay.
+---

chrono.docs/Rule/Core.md

@@ -0,0 +1,3 @@
+---
+category: Rule
+---

chrono.docs/Rule/Discarded.md

@@ -0,0 +1,4 @@
+---
+category: Rule
+description: Remove this card from your hand.
+---

chrono.docs/Rule/Round End.md

@@ -0,0 +1,4 @@
+---
+category: Rule
+description: The end state of the round. Triggered when both players end there turns without action.
+---