docs(ai): Improve README with model discovery and capabilities documentation

- Added note that library only includes tool-calling capable models
- Added Model Discovery section showing how to enumerate models
- Added examples for finding models with specific capabilities
- Added cache read/write costs to model capabilities display
- Clarified that models are auto-fetched from APIs at build time

package-lock.json

@@ -661,10 +661,6 @@
 			"dev": true,
 			"license": "MIT"
 		},
-		"node_modules/@mariozechner/ai": {
-			"resolved": "packages/ai",
-			"link": true
-		},
 		"node_modules/@mariozechner/pi": {
 			"resolved": "packages/pods",
 			"link": true
@@ -673,6 +669,10 @@
 			"resolved": "packages/agent",
 			"link": true
 		},
+		"node_modules/@mariozechner/pi-ai": {
+			"resolved": "packages/ai",
+			"link": true
+		},
 		"node_modules/@mariozechner/pi-tui": {
 			"resolved": "packages/tui",
 			"link": true
@@ -2716,10 +2716,10 @@
 		},
 		"packages/agent": {
 			"name": "@mariozechner/pi-agent",
-			"version": "0.5.9",
+			"version": "0.5.10",
 			"license": "MIT",
 			"dependencies": {
-				"@mariozechner/pi-tui": "^0.5.8",
+				"@mariozechner/pi-tui": "^0.5.9",
 				"@types/glob": "^8.1.0",
 				"chalk": "^5.5.0",
 				"glob": "^11.0.3",
@@ -3097,8 +3097,8 @@
 			}
 		},
 		"packages/ai": {
-			"name": "@mariozechner/ai",
-			"version": "0.5.9",
+			"name": "@mariozechner/pi-ai",
+			"version": "0.5.10",
 			"license": "MIT",
 			"dependencies": {
 				"@anthropic-ai/sdk": "^0.60.0",
@@ -3134,10 +3134,10 @@
 		},
 		"packages/pods": {
 			"name": "@mariozechner/pi",
-			"version": "0.5.9",
+			"version": "0.5.10",
 			"license": "MIT",
 			"dependencies": {
-				"@mariozechner/pi-agent": "^0.5.8",
+				"@mariozechner/pi-agent": "^0.5.9",
 				"chalk": "^5.5.0"
 			},
 			"bin": {
@@ -3150,7 +3150,7 @@
 		},
 		"packages/tui": {
 			"name": "@mariozechner/pi-tui",
-			"version": "0.5.9",
+			"version": "0.5.10",
 			"license": "MIT",
 			"dependencies": {
 				"@types/mime-types": "^2.1.4",