DEV-3918 feat(auto-exec-bin) add new subject and tests for auto-exec-bin exercise

sh/tests/auto-exec-bin_test.sh

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+#!/usr/bin/env bash
+
+# Unofficial Bash Strict Mode
+set -euo pipefail
+IFS='
+'
+
+FILENAME="student/auto-exec-bin.sh"
+script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
+
+setupbin() {
+    if [ -f ${FILENAME} ]; then
+        echo "bin already exists!"
+    else
+        mkdir -p ~/myBins
+        curl -o ~/myBins/01exec https://assets.01-edu.org/devops-branch/01exec
+        chmod +x ~/myBins/01exec
+        echo "bin installed!"
+    fi
+}
+
+challenge() {
+    # run soultion script
+    export PATH=""
+
+   	$(bash "$script_dirS"/$FILENAME)
+	submitted=$(cd / && 01exec)
+
+    # run student script
+    export PATH=""
+
+	$(bash "$script_dirS"/solutions/auto-exec-bin.sh)
+	expected=$(cd / && 01exec)
+
+    # diff
+	diff <(echo "$submitted") <(echo "$expected")
+}
+
+# True if FILE exists and is a regular file
+if [ -f ${FILENAME} ]; then
+    # FILE exists and it's not empty
+    if [ -s ${FILENAME} ]; then
+        if [[ $(cat $FILENAME | grep echo | wc -l) -ne 0 ]]; then
+            echo "echo is not allowed in this exercise!"
+            exit 1
+        fi
+        setupbin
+        challenge
+    else
+        echo "The file exist but is empty"
+        exit 1
+    fi
+else
+    echo "File does not exist"
+    exit 1
+fi

sh/tests/solutions/auto-exec-bin.sh

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+#!/usr/bin/env bash
+
+export PATH=$PATH:~/myBins

subjects/devops/auto-exec-bin/README.md

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+## auto-exec-bin
+
+### Instructions
+
+Create a file `auto-exec-bin.sh`, which will make a binary with the name `01exec` in `~/myBins` executable from any working directory.
+
+You can use any binary from your choice or you can use our binary: [01exec](https://assets.01-edu.org/devops-branch/01exec)
+> If our binary is not working in your environment, you can pick any binary for the tests!
+
+Expected Output:
+
+```console
+$ ls -l ~/myBins # the binary
+01exec
+$ 01exec
+error: command not found: 01exec
+$ ./auto-exec-bin.sh
+$ 01exec
+Hello 01 Scripting Pool
+$ cd /{random-path} && 01exec
+Hello 01 Scripting Pool
+$
+```
+
+### Hints
+
+`PATH` environment variable is a variable where the shell search for the binaries for the execution.
+when you put a command the shell will search for binary in `PATH` folders
+
+![auto binary exec](https://assets.01-edu.org/devops-branch/auto-exec-diagram.png)
+
+> You have to use Man or Google to know more about commands flags, in order to solve this exercise!
+> Google and Man will be your friends!