更新项目架构与存储适配器，添加用户认证功能

本次提交包含以下主要更改：
1. 更新 `.gitignore` 文件，添加对 `node_modules` 和环境变量文件的忽略。
2. 修改 `.gitmodules` 文件，替换为新的子模块 `cloudflare-worker`。
3. 新增 `ARCHITECTURE.md` 和 `PROJECT_REFACTOR_PLAN.md` 文档，详细描述项目架构和改造计划。
4. 实现用户认证功能，添加 GitHub OAuth 处理逻辑，支持 JWT 生成与解析。
5. 引入新的存储接口 `CanvasStore`，并实现相应的存储逻辑，支持用户画布的增删改查。
6. 更新 `main.go` 文件，整合新的认证与存储逻辑，优化路由设置。

这些更改旨在提升项目的可扩展性与用户体验，支持多用户环境下的画布管理与存储。

go.mod

@@ -1,14 +1,19 @@
 module excalidraw-complete
 
-go 1.21
+go 1.23.0
 
-toolchain go1.22.1
+toolchain go1.24.4
 
 require (
+	github.com/aws/aws-sdk-go-v2 v1.26.0
+	github.com/aws/aws-sdk-go-v2/config v1.27.9
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.53.0
 	github.com/go-chi/chi/v5 v5.0.12
 	github.com/go-chi/cors v1.2.1
 	github.com/go-chi/render v1.0.3
+	github.com/mattn/go-sqlite3 v1.14.22
 	github.com/oklog/ulid/v2 v2.1.0
+	github.com/sirupsen/logrus v1.9.3
 	github.com/zishang520/engine.io/v2 v2.0.6
 	github.com/zishang520/socket.io/v2 v2.0.5
 )
@@ -16,9 +21,7 @@ require (
 require (
 	github.com/ajg/form v1.5.1 // indirect
 	github.com/andybalholm/brotli v1.0.6 // indirect
-	github.com/aws/aws-sdk-go-v2 v1.26.0 // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.1 // indirect
-	github.com/aws/aws-sdk-go-v2/config v1.27.9 // indirect
 	github.com/aws/aws-sdk-go-v2/credentials v1.17.9 // indirect
 	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.0 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.4 // indirect
@@ -29,23 +32,22 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.3.6 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.11.6 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.17.4 // indirect
-	github.com/aws/aws-sdk-go-v2/service/s3 v1.53.0 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sso v1.20.3 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.23.3 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sts v1.28.5 // indirect
 	github.com/aws/smithy-go v1.20.1 // indirect
 	github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 // indirect
+	github.com/golang-jwt/jwt/v5 v5.2.2 // indirect
 	github.com/google/pprof v0.0.0-20230821062121-407c9e7a662f // indirect
 	github.com/gookit/color v1.5.4 // indirect
 	github.com/gorilla/websocket v1.5.0 // indirect
-	github.com/mattn/go-sqlite3 v1.14.22 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/onsi/ginkgo/v2 v2.12.0 // indirect
 	github.com/quic-go/qpack v0.4.0 // indirect
 	github.com/quic-go/qtls-go1-20 v0.4.1 // indirect
 	github.com/quic-go/quic-go v0.40.1 // indirect
 	github.com/quic-go/webtransport-go v0.6.0 // indirect
-	github.com/sirupsen/logrus v1.9.3 // indirect
 	github.com/vmihailenco/msgpack/v5 v5.4.1 // indirect
 	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
 	github.com/xo/terminfo v0.0.0-20210125001918-ca9a967f8778 // indirect
@@ -56,6 +58,7 @@ require (
 	golang.org/x/exp v0.0.0-20230817173708-d852ddb80c63 // indirect
 	golang.org/x/mod v0.12.0 // indirect
 	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/oauth2 v0.30.0 // indirect
 	golang.org/x/sys v0.15.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	golang.org/x/tools v0.12.1-0.20230815132531-74c255bcf846 // indirect