Fix all links in docs and analyses, and rename resources

[chalin]

• Contributes to #247
• Fixes all paths, of docs and analyses pages, that do not contain hashes (the link checker can't handle hashes)
• Renames resources to templates and adjusts template files names, dropping the -template suffix
• Ignores all *.tremor.rs links since they are no longer valid -- they should have implemented redirects
• Closes #238
• Closes #239

[nate-double-u]

Thanks for this @chalin, does this PR supercede https://github.com/cncf/techdocs/pull/239 & https://github.com/cncf/techdocs/pull/238?