docs: added links and getstarted to homepage

[k88hudson-cfa]

key links + a fun little game for the homepage :)

[github-actions]

Benchmark Results

Hyperfine

| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:---|---:|---:|---:|---:|
| `large_sir::baseline` | 2.7 ± 0.6 | 2.3 | 6.8 | 1.00 |
| `large_sir::entities` | 11.4 ± 2.4 | 10.4 | 22.7 | 4.19 ± 1.29 |

Criterion

Regressions:
  Group                                  Bench                                                              Change  CI Lower  CI Upper
  -------------------------------------  ----------------------------------------------------------------  -------  --------  --------
  indexing                               with_query_results_multiple_individually_indexed_properties_enti   1.686%    1.015%    2.403%
  indexing                               with_query_results_indexed_multi-property_entities                 0.366%    0.078%    0.846%
  indexing                               with_query_results_single_indexed_property_entities                1.413%    0.858%    1.836%
  indexing                               query_people_multiple_individually_indexed_properties_entities     0.947%    0.252%    1.613%
  large_dataset                          bench_filter_indexed_entity                                       15.244%    2.577%   28.066%
  large_dataset                          bench_match_entity                                                 1.155%    0.951%    1.357%
  large_dataset                          bench_query_population_derived_property_entities                   2.419%    2.230%    2.580%
  large_dataset                          bench_query_population_multi_unindexed_entities                    0.583%    0.265%    0.859%

Improvements:
  Group                                  Bench                                                              Change  CI Lower  CI Upper
  -------------------------------------  ----------------------------------------------------------------  -------  --------  --------
  sample_entity_single_property_indexed  10000                                                             -0.863%   -1.415%   -0.478%
  indexing                               query_people_count_single_indexed_property_entities               -3.997%   -4.844%   -3.248%
  indexing                               query_people_count_multiple_individually_indexed_properties_enti  -1.533%   -2.380%   -0.785%
  sample_entity_multi_property_indexed   100000                                                            -0.391%   -0.574%   -0.224%
  sampling                               sampling_single_l_reservoir_entities                              -1.588%   -2.047%   -1.141%
  sampling                               sampling_single_known_length_entities                             -3.486%   -4.381%   -2.644%
  sampling                               sampling_multiple_known_length_entities                           -0.299%   -0.393%   -0.219%
  sample_entity_whole_population         1000                                                              -2.135%   -2.734%   -1.564%

Unchanged:
  Group                                  Bench                                                              Change  CI Lower  CI Upper
  -------------------------------------  ----------------------------------------------------------------  -------  --------  --------
  sample_entity_single_property_indexed  100000                                                             0.376%   -0.059%    0.964%
  sample_entity_single_property_indexed  1000                                                              -0.053%   -0.522%    0.545%
  indexing                               query_people_indexed_multi-property_entities                      -0.309%   -0.835%    0.020%
  indexing                               query_people_count_indexed_multi-property_entities                -0.594%   -1.361%    0.075%
  indexing                               query_people_single_indexed_property_entities                     -0.109%   -0.210%    0.024%
  sample_entity_multi_property_indexed   10000                                                              0.025%   -0.577%    0.689%
  sample_entity_multi_property_indexed   1000                                                              -0.062%   -0.669%    0.595%
  large_dataset                          bench_query_population_property_entities                           0.250%   -0.178%    0.799%
  large_dataset                          bench_filter_unindexed_entity                                      2.731%   -3.997%    9.697%
  large_dataset                          bench_query_population_multi_indexed_entities                     -0.088%   -0.764%    0.327%
  large_dataset                          bench_query_population_indexed_property_entities                  -0.130%   -0.542%    0.452%
  sampling                               sampling_multiple_l_reservoir_entities                            -0.131%   -0.931%    0.610%
  sample_entity_whole_population         10000                                                              0.144%   -0.369%    0.517%
  sample_entity_whole_population         100000                                                             0.522%   -0.198%    1.377%

[RobertJacobsonCDC]

Cool!