fix: make API bool parameters in search_repos and list_releases optional (#40) (#44)

Fix #40

Left the `mcp.DefaultBool(false)` for `is_draft` and `is_pre_release` in `list_releases`, because I guess they are default, but it's up to the client whether to set them or not.
11e04b5b8d/operation/repo/release.go (L67-L68)

Reviewed-on: https://gitea.com/gitea/gitea-mcp/pulls/44
Reviewed-by: Bo-Yi Wu (吳柏毅) <appleboy.tw@gmail.com>
Co-authored-by: Hubert Wawrzyńczyk <hubert@fit-it.pl>
Co-committed-by: Hubert Wawrzyńczyk <hubert@fit-it.pl>

operation/search/search.go

@@ -144,8 +144,16 @@ func SearchReposFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolR
 	keywordIsTopic, _ := req.GetArguments()["keywordIsTopic"].(bool)
 	keywordInDescription, _ := req.GetArguments()["keywordInDescription"].(bool)
 	ownerID, _ := req.GetArguments()["ownerID"].(float64)
-	isPrivate, _ := req.GetArguments()["isPrivate"].(bool)
-	isArchived, _ := req.GetArguments()["isArchived"].(bool)
+	var pIsPrivate *bool
+	isPrivate, ok := req.GetArguments()["isPrivate"].(bool)
+	if ok {
+		pIsPrivate = ptr.To(isPrivate)
+	}
+	var pIsArchived *bool
+	isArchived, ok := req.GetArguments()["isArchived"].(bool)
+	if ok {
+		pIsArchived = ptr.To(isArchived)
+	}
 	sort, _ := req.GetArguments()["sort"].(string)
 	order, _ := req.GetArguments()["order"].(string)
 	page, ok := req.GetArguments()["page"].(float64)
@@ -161,8 +169,8 @@ func SearchReposFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolR
 		KeywordIsTopic:       keywordIsTopic,
 		KeywordInDescription: keywordInDescription,
 		OwnerID:              int64(ownerID),
-		IsPrivate:            ptr.To(isPrivate),
-		IsArchived:           ptr.To(isArchived),
+		IsPrivate:            pIsPrivate,
+		IsArchived:           pIsArchived,
 		Sort:                 sort,
 		Order:                order,
 		ListOptions: gitea_sdk.ListOptions{