Ensure simple program works

[atharvas]

This PR aims to address #21.

• Ensure Simple program works out of the box.
• Better error messages in llm_calls.txt.
• Clear-er instructions in README about how to interact with this repo.

[github-actions]

Benchmark Results

	master	7a9cfb5...	master/7a9cfb5a2a1a61...
search/multithreading	22.9 ± 1.7 s	24.2 ± 2.4 s	0.946
search/serial	33.5 ± 0.2 s	35 ± 1.9 s	0.958
utils/best_of_sample	1.04 ± 0.39 μs	1.2 ± 0.53 μs	0.867
utils/check_constraints_x10	12.3 ± 3.3 μs	12.2 ± 3.2 μs	1.01
utils/compute_complexity_x10/Float64	2.09 ± 0.13 μs	2.09 ± 0.11 μs	1
utils/compute_complexity_x10/Int64	2.1 ± 0.11 μs	2.01 ± 0.11 μs	1.04
utils/compute_complexity_x10/nothing	1.43 ± 0.089 μs	1.44 ± 0.099 μs	0.992
utils/optimize_constants_x10	0.0375 ± 0.0084 s	0.0379 ± 0.0089 s	0.989
time_to_load	3.65 ± 0.033 s	3.58 ± 0.02 s	1.02

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).

[coveralls]

Pull Request Test Coverage Report for Build 11722078151

Details

• 0 of 6 (0.0%) changed or added relevant lines in 2 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage remained the same at 78.46%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/LLMOptions.jl	0	1	0.0%
src/LLMFunctions.jl	0	5	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/LLMFunctions.jl	1	0.5%

Totals
Change from base Build 11001948874:	0.0%
Covered Lines:	2557
Relevant Lines:	3259

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💛 - Coveralls