Update cheatsheets

tldr/bun-exec

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# bun exec
+
+> Execute shell commands or script files using Bun's runtime.
+> Note: When running from a shell, remember to escape quotes.
+> More information: <https://bun.sh/docs/runtime/shell>.
+
+- Run a simple command:
+
+`bun exec "echo hello"`
+
+- Run a command with flags:
+
+`bun exec "ls -la"`
+
+- Run a command containing quotes:
+
+`bun exec "echo \"hello friends\""`
+
+- Run a combined shell command:
+
+`bun exec "mkdir test && cd test"`
+
+- Run a script file:
+
+`bun exec {{path/to/script}}`