Added Readme and testdata

README.md

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+# Test a String for '(),[],{}' well-formedness
+
+## Goal
+A string over the characters `()[]{}` is said to be well-formed, if the different types of brackets match __in the correct order__.
+
+Write a program that outputs `true` or `false` depending on the well-formedness of the input.
+
+### Example
+
+| Input    | Output |
+|----------|--------|
+| ([{}])() | true   |
+| ([)]     | false  |
+
+### Constraints
+Input strings consist only of characters `()[]{}`

settings.gradle

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-rootProject.name = 'template'
+rootProject.name = 'is-string-well-formed'

src/test/resources/testdata.csv

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+(),true
+{},true
+[],true
+()(),true
+(()),true
+[]{},true
+{[]},true
+()[()]({[()]})([]),true
+(,false
+],false
+{],false
+(},false
+([)],false
+{(((([))))}],false
+()[()]({[[(])]})([]),false