Fix broken and redirected links from scheduled check

Consolidate into single awesome-lint-compliant README

Address maintainer feedback on awesome list submission

Exclude opentext.com and sigmetrics.org from link checks

Replace & with and in cross-referenced headings for Zola compatibility

Address community review feedback on awesome list submission

Exclude netflixtechblog.com from link checks

Expand Learning Resources in both curated lists

Fix typo and remove promotional wording in Sematext entries

Merge pull request #4 from otisg/patch-1

Refine Sematext entry in observability tools list

Add Sematext

Add project logo to README

Prepare repo for sindresorhus/awesome submission

Fix broken links and update redirected URLs