Made Append(bool) faster

feat: PadLeft and PadRight

feat: added initial size

docs: added entry for release

Test for adding to TypedSpanList

Refactored Grow method

Fixed Bug where Grow used a too small number

Simplified AppendLine

Added changelog

Bump BenchmarkDotNet from 0.13.7 to 0.13.8

Bumps [BenchmarkDotNet](https://github.com/dotnet/BenchmarkDotNet) from 0.13.7 to 0.13.8.
- [Release notes](https://github.com/dotnet/BenchmarkDotNet/releases)
- [Commits](dotnet/BenchmarkDotNet@v0.13.7...v0.13.8)

---
updated-dependencies:
- dependency-name: BenchmarkDotNet
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>