Genkit Go v0.5.2

What's Changed

• feat(go/genkit): Add action context example by @rutujaD1999 in #2746
• feat(go/ai): added array and enum format support by @dysrama in #2745
• fix(go/ai): pass ptr. of value for generate data in JSON (#2756) by @suapapa in #2757
• bug(go): refactored Firebase plugin to adhere to plugin interface by @sahdev77 in #2753
• fix(go/genkit): Fix input from context by @rutujaD1999 in #2764
• feat(go/plugins/googlegenai): add image generation native support by @hugoaguirre in #2630
• feat(go/plugins/vertexai): Add modelgarden with anthropic support by @hugoaguirre in #2749
• fix(go/genkit): fix server response formatting and headers by @apascal07 in #2774
• feat({js,go}): Add gemini-2.5-flash-preview-04-17 to Vertex AI by @apascal07 in #2782

Full Changelog: go/v0.5.1...go/v0.5.2