fix(post-installation): use selected package manager (#342)

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: Aman Varshney <amanvarshney.work@gmail.com>

Author: 3 people

.changeset/shy-pillows-give.md

@@ -0,0 +1,5 @@
+---
+"create-better-t-stack": patch
+---
+
+fix(post-installation): use selected package manager

apps/cli/src/helpers/project-generation/post-installation.ts

@@ -108,10 +108,10 @@ export function displayPostInstallInstructions(
 					"IMPORTANT:",
 				)} Complete D1 database setup first (see Database commands below)\n`;
 			}
-			output += `${pc.cyan(`${stepCounter++}.`)} bun dev\n`;
+			output += `${pc.cyan(`${stepCounter++}.`)} ${runCmd} dev\n`;
 			output += `${pc.cyan(
 				`${stepCounter++}.`,
-			)} cd apps/server && bun run cf-typegen\n\n`;
+			)} cd apps/server && ${runCmd} run cf-typegen\n\n`;
 		} else {
 			output += "\n";
 		}