v0.15.0

What's Changed

• genai: use different model for tests requiring vision by @eliben in #135
• genai: fix nil pointer converting file metadata by @jba in #137
• genai: spell name of HTTP client option correctly by @jba in #139
• genai: get Live tests to pass by @jba in #141
• genai: remove support package by @jba in #142
• genai: update Tool example to be more resilient to model differences by @eliben in #146
• genai: turn conversion panics to errors by @jba in #143
• genai: improve code generation command by @jba in #144
• genai: upgrade cloud.google.com/go/ai to v0.7.0 by @jba in #145
• genai: add content caching by @jba in #147
• genai: pass cached content in request by @jba in #149
• genai: bump version for 0.15 release by @eliben in #148

Full Changelog: v0.14.0...v0.15.0