ggml : introduce semantic versioning (#1336)

ggml : introduce semantic versioning (#1336)

* ggml : introduce semantic versioning

This commit introduces semantic versioning for the GGML library.

The motivation for this is that the current versioning, using build
numbers, makes it difficult to track changes and releases for projects
that use ggml.

The release steps are the following:
1. Sync the changes from llama.cpp using sync-llama-am.sh and after the
   PR has been approved and merged move to step 2.
2. Run scripts/release.sh and specify the type of release, major, minor,
   or patch. This script will handle incrementing the version
   (major|minor|patch), create a new commit with the version change,
   create a tag for the version, and prepare for the next development
   iteration.
3. Inspect the commits/tag and push to master. This will trigger the
   github release workflow which is triggered for new tags which will
   then publish a new release on github.

Example usage:
```console
$ ./scripts/release.sh major --dry-run
[dry-run] - No changes will be made

Step 1: Reading current version...
Current version: 0.9.0-dev
New release version: 1.0.0

Step 2: Updating version in CMakeLists.txt...
  [dry-run] Would update GGML_VERSION_MAJOR to 1
  [dry-run] Would update GGML_VERSION_MINOR to 0
  [dry-run] Would update GGML_VERSION_PATCH to 0
  [dry-run] Would remove -dev suffix

Step 3: Committing version bump...
  [dry-run] Would commit: 'ggml : bump version to 1.0.0'

Step 4: Creating git tag...
  [dry-run] Would create tag: v1.0.0 with message 'Release version 1.0.0'

Step 5: Preparing for next development cycle...
  [dry-run] Would update GGML_VERSION_MINOR to 1
  [dry-run] Would add -dev suffix back

Step 6: Committing development version...
  [dry-run] Would commit: 'ggml : prepare for development of 1.1.0-dev'

[dry-run] Summary (no changes were made):
  • Would have released version: 1.0.0
  • Would have created tag: v1.0.0
  • Would have set next development version: 1.1.0-dev
```

Refs: https://github.com/ggml-org/ggml/issues/1333

* ggml: create branch for release candidate and check master

* ggml : sign the git tag