feat: Claude Code AI SDK v5 Integration (#1114)

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Ralph Khreish <35776126+Crunchyman-ralph@users.noreply.github.com>

.changeset/flat-cities-say.md

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+---
+"task-master-ai": minor
+---
+
+Added api keys page on docs website: docs.task-master.dev/getting-started/api-keys

.changeset/forty-tables-invite.md

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+---
+"task-master-ai": minor
+---
+
+Move to AI SDK v5:
+
+- Works better with claude-code and gemini-cli as ai providers
+- Improved openai model family compatibility
+- Migrate ollama provider to v2
+- Closes #1223, #1013, #1161, #1174