fix(workflows): normalize default branch to main across CI/release workflows and docs; update package metadata; clean .gitignore and fix readme license link

.gitea/workflows/README.md

@@ -6,7 +6,7 @@ This directory contains Gitea Actions workflows for automated CI/CD of the SZCI
 
 ### 1. CI (`ci.yml`)
 
-**Trigger:** Push to `master` branch or pull requests
+**Trigger:** Push to `main` branch or pull requests
 
 **Purpose:** Continuous integration checks on every push
 
@@ -87,7 +87,7 @@ To create a new release:
 3. **Create and push tag:**
    ```bash
    git tag v6.0.1
-   git push origin master
+   git push origin main
    git push origin v6.0.1
    ```
 

.gitea/workflows/ci.yml

@@ -3,10 +3,10 @@ name: CI
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 jobs:
   check:

.gitea/workflows/release.yml

@@ -117,7 +117,7 @@ jobs:
 
           Use the installation script:
           \`\`\`bash
-          curl -sSL https://code.foss.global/ship.zone/szci/raw/branch/master/install.sh | sudo bash
+          curl -sSL https://code.foss.global/ship.zone/szci/raw/branch/main/install.sh | sudo bash
           \`\`\`
 
           Or download the binary for your platform and make it executable.
@@ -143,7 +143,7 @@ jobs:
 
           Use the installation script:
           \`\`\`bash
-          curl -sSL https://code.foss.global/ship.zone/szci/raw/branch/master/install.sh | sudo bash
+          curl -sSL https://code.foss.global/ship.zone/szci/raw/branch/main/install.sh | sudo bash
           \`\`\`
           EOF
           fi
@@ -244,5 +244,5 @@ jobs:
           echo "https://code.foss.global/ship.zone/szci/releases/tag/${{ steps.version.outputs.version }}"
           echo ""
           echo "Installation command:"
-          echo "curl -sSL https://code.foss.global/ship.zone/szci/raw/branch/master/install.sh | sudo bash"
+          echo "curl -sSL https://code.foss.global/ship.zone/szci/raw/branch/main/install.sh | sudo bash"
           echo ""