Init optimization

[0xdea110c8]

What has been done:

• inlined internal initializer methods

[github-actions]

Unit Tests

Commit: 4bc3de0

Environment: Apple Swift version 6.3.3 (swiftlang-6.3.3.1.3 clang-2100.1.1.101)

✅ Tests passed

[0xdea110c8]

Benchmark results:

Method	Old	New	∆
init/15byte/inlinestring16	5.443	3.569	+34%
init/15byte/inlinestring16-string-literal	4.083	2.916	+29%
init/16byte/inlinestring16	7.614	4.734	+38%
init/16byte/inlinestring16-string-literal	6.488	4.268	+34%
init/empty/inlinestring16	1.112	1.113	+0%
init/empty/inlinestring16-string-literal	3.319	2.902	+13%