chore: Add PyPI package support for uvx/pip installation (#1764)

* Initial plan

* Add package structure and resource path utilities

- Created langbot/ package with __init__.py and __main__.py entry point
- Added paths utility to find frontend and resource files from package installation
- Updated config loading to use resource paths
- Updated frontend serving to use resource paths
- Added MANIFEST.in for package data inclusion
- Updated pyproject.toml with build system and entry points

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* Add PyPI publishing workflow and update license

- Created GitHub Actions workflow to build frontend and publish to PyPI
- Added license field to pyproject.toml to fix deprecation warning
- Updated .gitignore to exclude build artifacts
- Tested package building successfully

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* Add PyPI installation documentation

- Created PYPI_INSTALLATION.md with detailed installation and usage instructions
- Updated README.md to feature uvx/pip installation as recommended method
- Updated README_EN.md with same changes for English documentation

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* Address code review feedback

- Made package-data configuration more specific to langbot package only
- Improved path detection with caching to avoid repeated file I/O
- Removed sys.path searching which was incorrect for package data
- Removed interactive input() call for non-interactive environment compatibility
- Simplified error messages for version check

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* Fix code review issues

- Use specific exception types instead of bare except
- Fix misleading comments about directory levels
- Remove redundant existence check before makedirs with exist_ok=True
- Use context manager for file opening to ensure proper cleanup

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* Simplify package configuration and document behavioral differences

- Removed redundant package-data configuration, relying on MANIFEST.in
- Added documentation about behavioral differences between package and source installation
- Clarified that include-package-data=true uses MANIFEST.in for data files

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* chore: update pyproject.toml

* chore: try pack templates in langbot/

* chore: update

* chore: update

* chore: update

* chore: update

* chore: update

* chore: adjust dir structure

* chore: fix imports

* fix: read default-pipeline-config.json

* fix: read default-pipeline-config.json

* fix: tests

* ci: publish pypi

* chore: bump version 4.6.0-beta.1 for testing

* chore: add templates/**

* fix: send adapters and requesters icons

* chore: bump version 4.6.0b2 for testing

* chore: add platform field for docker-compose.yaml

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>
Co-authored-by: Junyan Qin <rockchinq@gmail.com>

src/langbot/templates/metadata/sensitive-words.json

@@ -0,0 +1,78 @@
+{
+    "说明": "mask将替换敏感词中的每一个字，若mask_word值不为空，则将敏感词整个替换为mask_word的值",
+    "mask": "*",
+    "mask_word": "",
+    "words": [
+        "习近平",
+        "胡锦涛",
+        "江泽民",
+        "温家宝",
+        "李克强",
+        "李长春",
+        "毛泽东",
+        "邓小平",
+        "周恩来",
+        "马克思",
+        "社会主义",
+        "共产党",
+        "共产主义",
+        "大陆官方",
+        "北京政权",
+        "中华帝国",
+        "中国政府",
+        "共狗",
+        "六四事件",
+        "天安门",
+        "六四",
+        "政治局常委",
+        "两会",
+        "共青团",
+        "学潮",
+        "八九",
+        "二十大",
+        "民进党",
+        "台独",
+        "台湾独立",
+        "台湾国",
+        "国民党",
+        "台湾民国",
+        "中华民国",
+        "pornhub",
+        "Pornhub",
+        "[Yy]ou[Pp]orn",
+        "porn",
+        "Porn",
+        "[Xx][Vv]ideos",
+        "[Rr]ed[Tt]ube",
+        "[Xx][Hh]amster",
+        "[Ss]pank[Ww]ire",
+        "[Ss]pank[Bb]ang",
+        "[Tt]ube8",
+        "[Yy]ou[Jj]izz",
+        "[Bb]razzers",
+        "[Nn]aughty[ ]?[Aa]merica",
+        "作爱",
+        "做爱",
+        "性交",
+        "性爱",
+        "自慰",
+        "阴茎",
+        "淫妇",
+        "肛交",
+        "交配",
+        "性关系",
+        "性活动",
+        "色情",
+        "色图",
+        "涩图",
+        "裸体",
+        "小穴",
+        "淫荡",
+        "性爱",
+        "翻墙",
+        "VPN",
+        "科学上网",
+        "挂梯子",
+        "GFW"
+    ]
+}