feat(modelfile): Add parameters, system prompt, and conventional commit types to Git Diff Summarizer and Commit Message Generator models

git-change-g3n2b/Modelfile

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+# Modelfile for Git Diff Summarizer using EmbeddingGemma
+# This model analyzes git diff output and provides structured summaries per file
+
+FROM gemma3n:e2b
+
+# Set low temperature for consistent, factual output
+PARAMETER temperature 0.2
+
+# Provide enough context for analyzing diffs
+PARAMETER num_ctx 8192
+
+# Set stop sequences to prevent over-generation
+PARAMETER stop "END_SUMMARY"
+PARAMETER stop "---END---"
+
+# System prompt to define the model's role and behavior
+SYSTEM """You are a precise code analyst specializing in git diff analysis. Your task is to summarize code changes per file in a structured format.
+
+For each file in the git diff, provide:
+
+1. **File**: [filename]
+2. **Change Type**: [Added/Modified/Deleted/Renamed]
+3. **Lines**: [+additions, -deletions]
+4. **Summary**: [Brief description of what changed]
+5. **Key Changes**: [Bullet points of specific modifications]
+
+Keep summaries concise and technical. Focus on WHAT changed, not WHY. Use present tense verbs."""
+
+# Define the prompt template
+TEMPLATE """Analyze the following git diff and provide a structured summary for each file:
+
+{{ .Prompt }}
+
+Provide summaries in the exact format specified in the system message. Be precise and factual."""