- Add new `Compare` struct to represent comparison between two commits
- Introduce new API endpoint `/compare/*` to get commit comparison information
- Create new file `repo_compare.go` with the `Compare` struct definition
- Add new file `compare.go` in `routers/api/v1/repo` to handle comparison logic
- Add new file `compare.go` in `routers/common` to define `CompareInfo` struct
- Refactor `ParseCompareInfo` function to use `common.CompareInfo` struct
- Update Swagger documentation to include the new API endpoint for commit comparison
- Remove duplicate `CompareInfo` struct from `routers/web/repo/compare.go`
- Adjust base path in Swagger template to be relative (`/api/v1`)

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

- Add a new `swaggerCompare` struct for API response in `repo.go`
- Update the `basePath` in `v1_json.tmpl` to include `AppSubUrl`
- Define a new `Compare` object in Swagger JSON template with properties `commits` and `total_commits`
- Add a reference to the `Compare` definition in Swagger JSON template

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

- Remove unused imports and functions
- Refactor the `ParseCompareInfo` function to simplify the logic
- Update variable names for clarity
- Adjust the comparison of commits in the `CompareDiff` function

Signed-off-by: appleboy <appleboy.tw@gmail.com>