chore: 迁移文档格式并清理旧文件

将多个.md文档转换为.txt格式，删除原始.md文件
更新文档内容并添加新的技术笔记

git/Git操作记录.txt

@@ -0,0 +1,167 @@
+# Git操作记录
+
+本文档记录了在仓库中执行的主要Git操作步骤和结果。
+
+## 1. 初始化本地Git仓库
+
+**操作命令：**
+```bash
+git init
+```
+
+**执行结果：**
+```
+Initialized empty Git repository in D:/工作/笔记/.git/
+```
+
+## 2. 设置远程仓库链接
+
+**操作命令：**
+```bash
+git remote add origin https://git.tsama.cn/bb/BiJi.git
+```
+
+**执行结果：** 成功添加远程仓库引用
+
+## 3. 添加并提交文件
+
+**操作命令：**
+```bash
+git add .
+```
+
+**执行结果：**
+```
+warning: in the working copy of 'Demo1/GPIO.md', LF will be replaced by CRLF the next time Git touches it
+warning: in the working copy of 'Demo1/demo.md', LF will be replaced by CRLF the next time Git touches it
+warning: in the working copy of 'git/git操作.md', LF will be replaced by CRLF the next time Git touches it
+warning: in the working copy of 'git/git流程..md', LF will be replaced by CRLF the next time Git touches it
+```
+
+**提交命令：**
+```bash
+git commit -m "初始化提交"
+```
+
+**执行结果：**
+```
+[master (root-commit) 5b02c1a] 初始化提交
+ 4 files changed, 166 insertions(+)
+ create mode 100644 Demo1/GPIO.md
+ create mode 100644 Demo1/demo.md
+ create mode 100644 "git/git操作.md"
+ create mode 100644 "git/git流程..md"
+```
+
+## 4. 推送到远程仓库
+
+**操作命令：**
+```bash
+git push -u origin master
+```
+
+**执行结果：**
+```
+Enumerating objects: 8, done.
+Counting objects: 100% (8/8), done.
+Delta compression using up to 16 threads
+Compressing objects: 100% (8/8), done.
+Writing objects: 100% (8/8), 3.64 KiB | 1.21 MiB/s, done.
+Total 8 (delta 0), reused 0 (delta 0), pack-reused 0 (from 0)
+remote:
+remote: Create a new pull request for 'master':
+remote:   https://git.tsama.cn/bb/BiJi/pulls/new/master
+remote:
+remote: . Processing 1 references
+remote: Processed 1 references in total
+To https://git.tsama.cn/bb/BiJi.git
+ * [new branch]      master -> master
+branch 'master' set up to track 'origin/master'.
+```
+
+## 5. 分支管理操作
+
+### 查看分支状态
+
+**操作命令：**
+```bash
+git branch -a
+```
+
+**初始状态：**
+```
+* master
+  remotes/origin/HEAD -> origin/main
+  remotes/origin/main
+  remotes/origin/master
+```
+
+### 尝试删除默认分支（失败）
+
+**操作命令：**
+```bash
+git push origin --delete main
+```
+
+**失败结果：**
+```
+remote:
+remote: error:
+remote: error: branch main is the default branch and cannot be deleted
+remote: error:
+To https://git.tsama.cn/bb/BiJi.git
+ ! [remote rejected] main (pre-receive hook declined)
+error: failed to push some refs to 'https://git.tsama.cn/bb/BiJi.git'
+```
+
+### 更改本地远程HEAD引用
+
+**操作命令：**
+```bash
+git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/master
+```
+
+### 通过Web界面更改默认分支
+
+在Git服务器Web界面执行以下操作：
+1. 登录到Git服务器（https://git.tsama.cn）
+2. 进入BiJi仓库设置
+3. 将默认分支从main更改为master
+
+### 成功删除远程main分支
+
+**操作命令：**
+```bash
+git push origin --delete main
+```
+
+**执行结果：**
+```
+remote: . Processing 1 references
+remote: Processed 1 references in total
+To https://git.tsama.cn/bb/BiJi.git
+ - [deleted]         main
+```
+
+## 6. 最终分支状态确认
+
+**操作命令：**
+```bash
+git branch -a
+```
+
+**最终状态：**
+```
+* master
+  remotes/origin/HEAD -> origin/master
+  remotes/origin/master
+```
+
+## 总结
+
+通过以上操作，我们成功地：
+1. 初始化了本地Git仓库并与远程仓库关联
+2. 提交并推送了初始代码
+3. 成功将远程仓库结构简化为仅保留master分支
+
+现在仓库结构更加清晰，所有开发工作都将在master分支上进行。