feat: provide a static buffer

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (2a88331) 98.69% compared to head (1c367f0) 98.69%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #32 +/- ## ======================================= Coverage 98.69% 98.69% ======================================= Files 45 45 Lines 4595 4597 +2 ======================================= + Hits 4535 4537 +2 Misses 60 60 ``` | [Files Changed](https://app.codecov.io/gh/Viatorus/emio/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Toni+Neubert) | Coverage Δ | | |---|---|---| | [test/unit\_test/test\_dynamic\_format\_spec.cpp](https://app.codecov.io/gh/Viatorus/emio/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Toni+Neubert#diff-dGVzdC91bml0X3Rlc3QvdGVzdF9keW5hbWljX2Zvcm1hdF9zcGVjLmNwcA==) | `100.00% <ø> (ø)` | | | [test/unit\_test/test\_format.cpp](https://app.codecov.io/gh/Viatorus/emio/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Toni+Neubert#diff-dGVzdC91bml0X3Rlc3QvdGVzdF9mb3JtYXQuY3Bw) | `99.60% <ø> (ø)` | | | [test/unit\_test/test\_format\_as.cpp](https://app.codecov.io/gh/Viatorus/emio/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Toni+Neubert#diff-dGVzdC91bml0X3Rlc3QvdGVzdF9mb3JtYXRfYXMuY3Bw) | `100.00% <ø> (ø)` | | | [test/unit\_test/test\_formatter.cpp](https://app.codecov.io/gh/Viatorus/emio/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Toni+Neubert#diff-dGVzdC91bml0X3Rlc3QvdGVzdF9mb3JtYXR0ZXIuY3Bw) | `98.37% <ø> (ø)` | | | [include/emio/buffer.hpp](https://app.codecov.io/gh/Viatorus/emio/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Toni+Neubert#diff-aW5jbHVkZS9lbWlvL2J1ZmZlci5ocHA=) | `97.81% <100.00%> (+0.03%)` | :arrow_up: | | [test/unit\_test/test\_buffer.cpp](https://app.codecov.io/gh/Viatorus/emio/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Toni+Neubert#diff-dGVzdC91bml0X3Rlc3QvdGVzdF9idWZmZXIuY3Bw) | `100.00% <100.00%> (ø)` | | | [test/unit\_test/test\_format\_to\_api.cpp](https://app.codecov.io/gh/Viatorus/emio/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Toni+Neubert#diff-dGVzdC91bml0X3Rlc3QvdGVzdF9mb3JtYXRfdG9fYXBpLmNwcA==) | `100.00% <100.00%> (ø)` | | | [test/unit\_test/test\_ranges.cpp](https://app.codecov.io/gh/Viatorus/emio/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Toni+Neubert#diff-dGVzdC91bml0X3Rlc3QvdGVzdF9yYW5nZXMuY3Bw) | `100.00% <100.00%> (ø)` | |

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