Function isSemverTag

isSemverTag(tag: string): boolean
Checks whether a given string conforms to a Semantic Version (SemVer) tag format.

Supports:
- Optional v prefix (e.g. v1.2.3)
- Standard MAJOR.MINOR.PATCH versions
- Optional pre-release identifiers (e.g. -alpha, -beta.1)
Does NOT validate:
- Build metadata (+build)
- Strict SemVer edge cases (kept intentionally lightweight)
Parameters
- tag: string
  The tag name to check.
Returns boolean
true if the tag matches a SemVer-compatible format, otherwise false.
Example
```
isSemverTag("v1.0.0");        // true
isSemverTag("1.2.3");         // true
isSemverTag("1.2.3-alpha");   // true
```
Example
```
isSemverTag("v1");            // false
isSemverTag("version-1.0.0"); // false
```
Since
1.0.0
- Defined in tag/isSemverTag.ts:30