Feat/simplify sampling interface

[hsloot]

Related issues

Closes #98

Checklist

• [x] R CMD CHECK successful
• [x] tests included
• [x] documentation included or updated
• [x] commit messages follow commit guidelines

Only for new or refactored algorithms:

• [x] benchmarks (and comparison with the previous version) included

Optional, but recommended:

• [x] code passes lintr::lint_package() without errors

Description

We introduce specific and improved entry point methods for the sampling algorithms.

[codecov[bot]]

Codecov Report

Merging #103 (9519eaf) into master (d5b77c0) will increase coverage by 0.36%. The diff coverage is 98.90%.

@@            Coverage Diff             @@
##           master     #103      +/-   ##
==========================================
+ Coverage   90.80%   91.16%   +0.36%     
==========================================
  Files          32       32              
  Lines        1250     1335      +85     
==========================================
+ Hits         1135     1217      +82     
- Misses        115      118       +3     

Impacted Files	Coverage Δ
R/valueOf-S4.R	93.20% <ø> (ø)
R/sample.R	98.90% <98.90%> (-1.10%)	:arrow_down:
src/sample.cpp	86.20% <0.00%> (-6.90%)	:arrow_down:

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