feat: add Ollama provider support

Add support for Ollama as a provider in CCS, enabling users to use
local Ollama models (qwen3-coder, gpt-oss:20b, gpt-oss:120b) and
Ollama Cloud models (glm-4.7:cloud, qwen3-coder:480b).

Changes:
- Add base-ollama.settings.json for local Ollama (localhost:11434)
- Add base-ollama-cloud.settings.json for ollama.com cloud API
- Add 'ollama' and 'ollama-cloud' presets to provider-presets.ts
- Update help documentation in api-command.ts and help-command.ts

Usage:
  ccs api create --preset ollama          # Local Ollama
  ccs api create --preset ollama-cloud    # Ollama Cloud

Ref: https://github.com/kaitranntt/ccs/issues/353

Co-Authored-By: Claude <noreply@anthropic.com>

config/base-ollama-cloud.settings.json

@@ -0,0 +1,10 @@
+{
+  "env": {
+    "ANTHROPIC_BASE_URL": "https://ollama.com",
+    "ANTHROPIC_AUTH_TOKEN": "YOUR_OLLAMA_CLOUD_API_KEY_HERE",
+    "ANTHROPIC_MODEL": "glm-4.7:cloud",
+    "ANTHROPIC_DEFAULT_OPUS_MODEL": "qwen3-coder:480b",
+    "ANTHROPIC_DEFAULT_SONNET_MODEL": "glm-4.7:cloud",
+    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "minimax-m2.1:cloud"
+  }
+}

config/base-ollama.settings.json

@@ -0,0 +1,10 @@
+{
+  "env": {
+    "ANTHROPIC_BASE_URL": "http://localhost:11434",
+    "ANTHROPIC_AUTH_TOKEN": "ollama",
+    "ANTHROPIC_MODEL": "qwen3-coder",
+    "ANTHROPIC_DEFAULT_OPUS_MODEL": "gpt-oss:120b",
+    "ANTHROPIC_DEFAULT_SONNET_MODEL": "gpt-oss:20b",
+    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "qwen3-coder"
+  }
+}