refactor!: rebrand bterminal to agor (agents-orchestrator)

Rename Cargo crates (bterminal-core→agor-core, bterminal-relay→agor-relay),
env vars (BTERMINAL_*→AGOR_*), config paths (~/.config/agor), CSS custom
properties, plugin API object, package names, and all documentation.

BREAKING CHANGE: config/data paths changed from bterminal to agor.

Cargo.lock

@@ -12,7 +12,8 @@ checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
 name = "agent-orchestrator"
 version = "0.1.0"
 dependencies = [
- "bterminal-core",
+ "agor-core",
+ "agor-pro",
  "dirs 5.0.1",
  "futures-util",
  "hex",
@@ -43,6 +44,48 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "agor-core"
+version = "0.1.0"
+dependencies = [
+ "dirs 5.0.1",
+ "landlock",
+ "log",
+ "portable-pty",
+ "serde",
+ "serde_json",
+ "uuid",
+]
+
+[[package]]
+name = "agor-pro"
+version = "0.1.0"
+dependencies = [
+ "agor-core",
+ "log",
+ "serde",
+ "serde_json",
+ "tauri",
+]
+
+[[package]]
+name = "agor-relay"
+version = "0.1.0"
+dependencies = [
+ "agor-core",
+ "clap",
+ "env_logger",
+ "futures-util",
+ "log",
+ "native-tls",
+ "serde",
+ "serde_json",
+ "tokio",
+ "tokio-native-tls",
+ "tokio-tungstenite",
+ "uuid",
+]
+
 [[package]]
 name = "ahash"
 version = "0.8.12"
@@ -398,37 +441,6 @@ dependencies = [
  "alloc-stdlib",
 ]
 
-[[package]]
-name = "bterminal-core"
-version = "0.1.0"
-dependencies = [
- "dirs 5.0.1",
- "landlock",
- "log",
- "portable-pty",
- "serde",
- "serde_json",
- "uuid",
-]
-
-[[package]]
-name = "bterminal-relay"
-version = "0.1.0"
-dependencies = [
- "bterminal-core",
- "clap",
- "env_logger",
- "futures-util",
- "log",
- "native-tls",
- "serde",
- "serde_json",
- "tokio",
- "tokio-native-tls",
- "tokio-tungstenite",
- "uuid",
-]
-
 [[package]]
 name = "bumpalo"
 version = "3.20.2"