Kah Goh
This adds the list ops exercise for 48in24 and is based on previously done by bobbicodes under #552. Also contains a fix for the location of the CI example location...
Adds the [parallel letter frequency for 48in24](https://forum.exercism.org/t/48in24-exercise-03-12-parallel-letter-frequency/9927/).
The concept could be useful as a prerequisite for the parallel letter frequencies exercise
# pull request Closes #1809 --- Reviewer Resources: [Track Policies](https://github.com/exercism/java/blob/main/POLICIES.md#event-checklist)
This is one of the [48in24](https://forum.exercism.org/t/48in24-exercise-09-24-isogram/12894) exercises.
See https://forum.exercism.org/t/suggestion-deprecate-minesweeper-for-flower-field/17967/23
The [baffling-birthdays](https://github.com/exercism/problem-specifications/tree/main/exercises/baffling-birthdays) exercise was recently added to the problem specifications. This task is to add the practice exercise to the Java track.
The [camicia](https://github.com/exercism/problem-specifications/tree/main/exercises/camicia) exercise was recently added to the problem specifications. This task is to add the exercise to the Java track.
Includes concept and exercise. Used secret agent from the Swift track for inspiration for the exercise. cc @SleeplessByte @colinleach
This is for the bitwise operations concept (related to #716).