Create README.md with setup and usage details

Add initial README with installation instructions and test commands.

Author: TriTechX

README.md

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+# CoreBench - The Benchmark Built for Consumers
+CoreBench is a versatile CLI CPU benchmark suite built for Linux, designed from the ground up with consumers in mind.
+
+## How To
+*Note: Python 3.11+ is required to run this program. If Python 3.14+ is not found, CoreBench will automatically install it.*
+
+### Windows
+Download the latest release from the tag and unzip it.\
+Run the `corebench.bat` file to begin installation of dependencies and run CoreBench.\
+*Note: scores may be inaccurate on Windows compared ot the same machine running Linux, we are aiming to fix this soon.*
+
+### Linux
+Download the latest release from the tag and unzip it.\
+Inside of the extracted folder, run `chmod +x corebench.sh && ./corebench.sh` to begin installation of dependencies and run CoreBench
+
+#### Test Commands
+`sc` - Single Core\
+`mc` - Multi Core\
+`mt` - Multi Thread\
+`gflops` - GFLOPs test\
+`api` - Set the API key\
+`clear` - Clear the screen\
+`fc` - Full CPU test (scores are uploaded to https://corebench.me)
+
+#### Terminal Command Execution
+If you provide CoreBench with command-line arguments during execution, it will behave differently on startup.\
+``--t <COMMAND>`` - run a test command\
+``--m`` - run the whole program in your current environment (not recommended)\
+``--b <COMMAND?>`` - create a CoreBench "build"