feat: agregar config SharedKnowledge a schema.go

- Nuevo tipo SharedKnowledgeToolCfg con enabled, dir, db_path
- Agregar campo SharedKnowledge a ToolsCfg
- Issue 0018: Shared Knowledge (fase 1)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

internal/config/schema.go

@@ -121,14 +121,15 @@ type LLMRateLimitCfg struct {
 // ── Tools ─────────────────────────────────────────────────────────────────
 
 type ToolsCfg struct {
-	SSH       SSHToolCfg       `yaml:"ssh"`
-	HTTP      HTTPToolCfg      `yaml:"http"`
-	Scripts   ScriptsCfg       `yaml:"scripts"`
-	FileOps   FileOpsCfg       `yaml:"file_ops"`
-	Matrix    MatrixToolCfg    `yaml:"matrix_send"`
-	MCP       MCPToolCfg       `yaml:"mcp"`
-	Memory    MemoryToolCfg    `yaml:"memory"`
-	Knowledge KnowledgeToolCfg `yaml:"knowledge"`
+	SSH             SSHToolCfg             `yaml:"ssh"`
+	HTTP            HTTPToolCfg            `yaml:"http"`
+	Scripts         ScriptsCfg             `yaml:"scripts"`
+	FileOps         FileOpsCfg             `yaml:"file_ops"`
+	Matrix          MatrixToolCfg          `yaml:"matrix_send"`
+	MCP             MCPToolCfg             `yaml:"mcp"`
+	Memory          MemoryToolCfg          `yaml:"memory"`
+	Knowledge       KnowledgeToolCfg       `yaml:"knowledge"`
+	SharedKnowledge SharedKnowledgeToolCfg `yaml:"shared_knowledge"`
 }
 
 type MatrixToolCfg struct {
@@ -140,6 +141,12 @@ type KnowledgeToolCfg struct {
 	Dir     string `yaml:"dir"` // default: "./knowledge" (relative to agent dir)
 }
 
+type SharedKnowledgeToolCfg struct {
+	Enabled bool   `yaml:"enabled"` // default false
+	Dir     string `yaml:"dir"`     // default "knowledges" (relative to project root)
+	DBPath  string `yaml:"db_path"` // default "knowledges/data/knowledge.db"
+}
+
 type SSHToolCfg struct {
 	Enabled             bool          `yaml:"enabled"`
 	AllowedTargets      []string      `yaml:"allowed_targets"`