fix: added a config parse backup

fix: modify cache key with engines used for search

Merge branch 'neon-mmd:rolling' into rolling

Merge pull request #469 from neon-mmd/FIX/468_pagination-for-the-upstream-search-engines-not-working

Merge branch 'rolling' into FIX/468_pagination-for-the-upstream-search-engines-not-working

🔖 chore(release): bump the app version (#468)

🚑️ fix(engine): fix the pagination code for `startpage` engine (#468)

🚑️ fix(engine): fix the pagination code for `searx` engine (#468)

🚑️ fix(engine): fix the pagination code for `librex` engine (#468)

🚑️ fix(engine): fix the pagination code for `duckduckgo` engine (#468)

Merge remote-tracking branch 'upstream/rolling' into rolling

Squashed commit of the following:

Merge pull request #462 from neon-mmd/CHORE/461_display-the-user-provided-settings-from-the-config-or-the-ui-in-the-settings-page

Merge branch 'rolling' into CHORE/461_display-the-user-provided-settings-from-the-config-or-the-ui-in-the-settings-page

♻️ refactor: start tracking page numbers from 0 instead of 1 in the backend (#467)

✨ feat(engine): `mojeek` for the search engine (#464)

🚨 chore: make cargo format checks happy (#461)

Merge branch 'rolling' into CHORE/461_display-the-user-provided-settings-from-the-config-or-the-ui-in-the-settings-page

🔖 chore: bump the app version (#461)

🚨 chore: make clippy checks happy (#461)

💄 chore: add style for the new message when a setting is managed by the config cannot be altered/modified (#461)

🚸 chore: pass the `safe_search_level` & `upstream_search_engines` as a hashmap in the `settings` view function (#461)

🚸 chore: add code to display saved settings from the config on the settings page (#461)

🚸 chore: add code to display saved user settings from the cookies on the settings page (#461)

🐛 fix: explicit `content-type` header for the search page response (#458)

🐛 fix: explicit Content-Type header for HTTP response (#457)

Merge branch 'neon-mmd:rolling' into rolling

Merge pull request #455 from neon-mmd/DOCS/439_revise-the-docs-to-remain-in-sync-with-the-current-changes

Merge branch 'rolling' into DOCS/439_revise-the-docs-to-remain-in-sync-with-the-current-changes

:memo: Developer environment setup on NixOS (#454)

Merge branch 'rolling' into DOCS/439_revise-the-docs-to-remain-in-sync-with-the-current-changes

🔖 chore: bump the app version (#439)

📝 docs: provide a note on the `pkg_env` environment variable & update the example config file (#439)

📝 docs: update the theme example & add a new animation section (#439)

📝 docs: provide explanation for the new config file options (#439)

🧑‍💻 feat: add cargo-watch to nix dev shell (#452)

📝 docs: update the project structure and the associated explaination (#439)

Merge branch 'neon-mmd:rolling' into rolling

🐛 fix: add openssl runtime dependencies (#451)

💄 Different text color for the visited search results title links in the search page (#445)

Merge pull request #442 from neon-mmd/imgbot

🔖 chore(release): bump the app version (#442)

🔖 chore(release): bump the app version (#442)

[ImgBot] Optimize images

Merge pull request #441 from neon-mmd/DOCS/430_new-preview-demo-images-of-the-search-engine-on-the-readme

Merge branch 'rolling' into DOCS/430_new-preview-demo-images-of-the-search-engine-on-the-readme

🔖 chore(release): bump the app version (#430)

📝 docs(readme): update the preview images according to the new redesign of the themes (#430)

Merge remote-tracking branch 'upstream/rolling' into rolling

Merge pull request #438 from neon-mmd/CHORE/432_duckduckgo-engine-code-according-to-the-new-html-changes