Release 1.0.0 final changes

[MilesCranmer]

This creates a full CHANGELOG.md based on all of the release notes. It also creates the 1.0.0 release notes giving descriptions of the various new features.

TODO:

• Make TemplateExpression more robust
• Nice example with structs
• New URL

[github-actions]

Benchmark Results

	master	b62598f...	master/b62598f8b9fa3d...
search/multithreading	27 ± 3.7 s	26.8 ± 2.5 s	1.01
search/serial	41.4 ± 1.7 s	39.2 ± 0.6 s	1.06
utils/best_of_sample	2.22 ± 1.7 μs	1.85 ± 1.6 μs	1.2
utils/check_constraints_x10	12.2 ± 3.2 μs	12.1 ± 3.2 μs	1.01
utils/compute_complexity_x10/Float64	2.11 ± 0.13 μs	2.1 ± 0.12 μs	1
utils/compute_complexity_x10/Int64	2.03 ± 0.11 μs	2.05 ± 0.11 μs	0.99
utils/compute_complexity_x10/nothing	1.49 ± 0.11 μs	1.45 ± 0.12 μs	1.03
utils/insert_random_op_x10	5.85 ± 2 μs	5.86 ± 1.9 μs	0.998
utils/next_generation_x100	0.412 ± 0.12 ms	0.435 ± 0.13 ms	0.947
utils/optimize_constants_x10	0.0402 ± 0.0091 s	0.038 ± 0.01 s	1.06
utils/randomly_rotate_tree_x10	5.28 ± 0.62 μs	5.3 ± 0.6 μs	0.996
time_to_load	1.66 ± 0.05 s	1.69 ± 0.053 s	0.981

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 11439984339

Details

• 87 of 106 (82.08%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.5%) to 94.818%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/TemplateExpression.jl	59	78	75.64%

Totals
Change from base Build 11412416831:	-0.5%
Covered Lines:	2873
Relevant Lines:	3030

---

💛 - Coveralls

[MilesCranmer]

I think in the example it would be nice to have an example with a literal user-defined struct getting returned from the structure function. And the fields of that struct could depend nonlinearly on the functions evolved.

[MilesCranmer]

e.g.,

struct Energy{T}
    hamiltonian::T
    lagrangian::T
end

energy(nt) = map(
    (T, V) -> Energy(T + V, T - V),
    nt.T, nt.V
)
energy(nt::NamedTuple{<:Any,Tuple{Vararg{String}}}) = (
    "(T = $(nt.T), V = $(nt.V))"
)

variable_mapping = (; T = [1], V = [2])

and then do a search based on some values of H and L!

(Maybe there should be a hasmethod check that falls back to this printing style as default?)