minor clean up of repo

[Blargian]

Summary

Minor repo cleanup:

• add a contributing folder to house anything contribution related. Move CODE_OF_CONDUCT.md to this folder.
• add templates_and_guides directory to above mentioned folder to house any templates or guides, added a readme to explain the purpose.
• move scripts in root to /scripts
• move the image in the root to /images
• delete pagerank.csv (not sure if this is needed or not?)
• rename copyClickhouseRepoDocs.sh to copyClickHouseRepoDocs.sh
• Fix up issues with copyClickHouseRepDocs.sh and autogenerate-settings.sh caused by moving the files.
• Add basic error handling to the scripts above.

Checklist

• Delete items not relevant to your PR
• URL changes should add a redirect to the old URL via https://github.com/ClickHouse/clickhouse-docs/blob/main/docusaurus.config.js
• If adding a new integration page, also add an entry to the integrations list here: https://github.com/ClickHouse/clickhouse-docs/blob/main/docs/en/integrations/index.mdx

[gingerwizard]

@Blargian the change log generation script is causing the build to fail.

[copyClickHouseRepoDocs.sh] Copying completed successfully
[copyClickHouseRepoDocs.sh] Generate changelog
scripts/copyClickHouseRepoDocs.sh: line 36: ClickHouse/CHANGELOG.md: No such file or directory
[copyClickHouseRepoDocs.sh] An error occurred: Generating changelog
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Error: Command "yarn new-build" exited with 1

[gingerwizard]

see build log

[gingerwizard]

@Blargian

Module not found: Error: Can't resolve '@site/docs/en/_snippets/_system_table_cloud.md' in '/vercel/path0/docs/en/operations/system-tables'
Module not found: Error: Can't resolve '@site/docs/en/_snippets/_system_table_cloud.md' in '/vercel/path0/docs/en/operations/system-tables'

[Blargian]

@site/docs/en/_snippets/_system_table_cloud.md

Builds and runs okay locally. I'll need to check how things are set up on vercel, look at the logs there etc. I don't currently have any vercel deployment preview access. Will take a look next week.