feat(coding-agent): ResourceLoader, package management, and /reload command (#645)

- Add ResourceLoader interface and DefaultResourceLoader implementation
- Add PackageManager for npm/git extension sources with install/remove/update
- Add session.reload() and session.bindExtensions() APIs
- Add /reload command in interactive mode
- Add CLI flags: --skill, --theme, --prompt-template, --no-themes, --no-prompt-templates
- Add pi install/remove/update commands for extension management
- Refactor settings.json to use arrays for skills, prompts, themes
- Remove legacy SkillsSettings source flags and filters
- Update SDK examples and documentation for ResourceLoader pattern
- Add theme registration and loadThemeFromPath for dynamic themes
- Add getShellEnv to include bin dir in PATH for bash commands

packages/coding-agent/examples/sdk/08-prompt-templates.ts

@@ -6,18 +6,11 @@
 
 import {
 	createAgentSession,
-	discoverPromptTemplates,
+	DefaultResourceLoader,
 	type PromptTemplate,
 	SessionManager,
 } from "@mariozechner/pi-coding-agent";
 
-// Discover templates from cwd/.pi/prompts/ and ~/.pi/agent/prompts/
-const discovered = discoverPromptTemplates();
-console.log("Discovered prompt templates:");
-for (const template of discovered) {
-	console.log(`  /${template.name}: ${template.description}`);
-}
-
 // Define custom templates
 const deployTemplate: PromptTemplate = {
 	name: "deploy",
@@ -30,13 +23,24 @@ const deployTemplate: PromptTemplate = {
 3. Deploy: npm run deploy`,
 };
 
-// Use discovered + custom templates
+const loader = new DefaultResourceLoader({
+	promptsOverride: (current) => ({
+		prompts: [...current.prompts, deployTemplate],
+		diagnostics: current.diagnostics,
+	}),
+});
+await loader.reload();
+
+// Discover templates from cwd/.pi/prompts/ and ~/.pi/agent/prompts/
+const discovered = loader.getPrompts().prompts;
+console.log("Discovered prompt templates:");
+for (const template of discovered) {
+	console.log(`  /${template.name}: ${template.description}`);
+}
+
 await createAgentSession({
-	promptTemplates: [...discovered, deployTemplate],
+	resourceLoader: loader,
 	sessionManager: SessionManager.inMemory(),
 });
 
 console.log(`Session created with ${discovered.length + 1} prompt templates`);
-
-// Disable prompt templates:
-// promptTemplates: []