feat(ai): Adding Cline rules files

.clinerules/shell.md

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+# Shell & OS Rules
+
+- Always use bash/sh syntax for terminal commands, never PowerShell
+- Use `cp` instead of `Copy-Item`
+- Use `mv` instead of `Move-Item`
+- Use `rm` instead of `Remove-Item`
+- Use `mkdir -p` instead of `New-Item -ItemType Directory`
+- Use `cat` instead of `Get-Content`
+- Use forward slashes `/` in paths, never backslashes `\`
+- Do not use `$env:` for environment variables, use `$VAR` syntax