Add tidwall/buntdb instrumentation

[TomRoSystems]

This new module instruments the github.com/tidwall/buntdb package.

• Comply with OpenTelemetry HTTP semantic conventions
• Package documentation
• Exported objects are documented
• Tests and linting are passing
• Includes dependabot config
• Library added to README.md
• CHANGELOG.md updated

[MrAlias]

Please add dependabot configuration for the added modules (make gendependabot) and be sure to fix all test failures.

[codecov-commenter]

Codecov Report

Merging #228 (965491b) into main (ed64e83) will decrease coverage by 0.08%.
The diff coverage is 76.47%.

@@            Coverage Diff             @@
##             main     #228      +/-   ##
==========================================
- Coverage   77.47%   77.39%   -0.09%     
==========================================
  Files          45       47       +2     
  Lines        2087     2358     +271     
==========================================
+ Hits         1617     1825     +208     
- Misses        429      485      +56     
- Partials       41       48       +7     

Flag	Coverage Δ
Linux	76.97% <76.47%> (-0.03%)	⬇️
Windows	75.32% <76.47%> (+0.21%)	⬆️
macOS	75.23% <76.47%> (+0.19%)	⬆️

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Impacted Files	Coverage Δ
build/pipeline.go	2.76% <0.00%> (ø)
...n/github.com/tidwall/buntdb/splunkbuntdb/config.go	55.55% <55.55%> (ø)
...n/github.com/tidwall/buntdb/splunkbuntdb/buntdb.go	87.29% <87.29%> (ø)

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[MrAlias]

The splunkbuntdb package needs a README similar to existing ones.

[MrAlias]

Can we add tests for the Open function and both WithContext methods?