feat: add flexsearch

.eslintignore

.github/workflows/codeql-analysis.yml

.markdownlint.json

.markdownlintignore

.stylelintignore

.travis.yml

CHANGELOG.md

CODE_OF_CONDUCT.md

LICENSE

README.md

archetypes/blog.md

archetypes/default.md

archetypes/docs.md

assets/js/app.js

assets/js/index.js

assets/scss/app.scss

assets/scss/common/_dark.scss

assets/scss/common/_global.scss

assets/scss/common/_syntax.scss

assets/scss/common/_variables.scss