feat(challenges): add prefix-suffix

challenges/prefix-suffix/README.md

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+# prefix-suffix
+
+Created by [@Divlo](https://github.com/Divlo) on 2 December 2021.
+
+## Instructions
+
+A prefix is an affix which is placed before the stem of a word. Adding it to the beginning of one word changes it into another word. For example, when the prefix un- is added to the word happy, it creates the word unhappy.
+
+A suffix is an affix which is placed after the stem of a word. Common examples are case endings, which indicate the grammatical case of nouns, adjectives, and verb endings, which form the conjugation of verbs. Suffixes can carry grammatical information or lexical information.
+
+Write a programs that takes 2 strings ("words") and prints if one is a prefix/suffix of the other.
+
+### Input
+
+- **Line 1:** The word to be checked
+- **Line 2:** The potential prefix/suffix
+
+### Output
+
+- **Line 1:** `true` if the second word is a **prefix** of the first, `false` otherwise
+- **Line 1:** `true` if the second word is a **suffix** of the first, `false` otherwise
+
+## Source
+
+- [Wikipedia - Prefix](https://en.wikipedia.org/wiki/Prefix)
+- [Wikipedia - Suffix](https://en.wikipedia.org/wiki/Suffix)
+
+## Examples
+
+### Example 1
+
+#### Input
+
+```txt
+Py
+AlgoPy
+```
+
+#### Output
+
+```txt
+false
+false
+```
+
+### Example 2
+
+#### Input
+
+```txt
+AlgoPy
+Py
+```
+
+#### Output
+
+```txt
+false
+true
+```
+
+### Example 3
+
+#### Input
+
+```txt
+same-word
+same-word
+```
+
+#### Output
+
+```txt
+true
+true
+```
+
+See the `test` folder for examples of input/output.

challenges/prefix-suffix/test/1/input.txt

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+Py
+AlgoPy

challenges/prefix-suffix/test/1/output.txt

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+false
+false

challenges/prefix-suffix/test/2/input.txt

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+AlgoPy
+Py

challenges/prefix-suffix/test/2/output.txt

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+false
+true

challenges/prefix-suffix/test/3/input.txt

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+same-word
+same-word

challenges/prefix-suffix/test/3/output.txt

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+true
+true

challenges/prefix-suffix/test/4/input.txt

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+unhappy
+un

challenges/prefix-suffix/test/4/output.txt

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+true
+false

challenges/prefix-suffix/test/5/input.txt

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+overload
+over

challenges/prefix-suffix/test/5/output.txt

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+true
+false

challenges/prefix-suffix/test/6/input.txt

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+simplify
+ify

challenges/prefix-suffix/test/6/output.txt

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+false
+true