Rename project from viberogue to Kiln

Updates Cargo.toml package name, window title, and all references in
ARCHITECTURE.md and CLAUDE.md.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Cargo.lock

@@ -1638,6 +1638,16 @@ version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2db585e1d738fc771bf08a151420d3ed193d9d895a36df7f6f8a9456b911ddc"
 
+[[package]]
+name = "kiln"
+version = "0.1.0"
+dependencies = [
+ "eframe",
+ "rhai",
+ "serde",
+ "toml",
+]
+
 [[package]]
 name = "leb128fmt"
 version = "0.1.0"
@@ -3164,16 +3174,6 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
-[[package]]
-name = "viberogue"
-version = "0.1.0"
-dependencies = [
- "eframe",
- "rhai",
- "serde",
- "toml",
-]
-
 [[package]]
 name = "walkdir"
 version = "2.5.0"