* zstd: add link to homepage
* zsh: add link to homepage
* zopflipng: add link to homepage
* zbarimg: add link to homepage
* z: add link to homepage
* yesod: add link to homepage
* xsv: add link to homepage
* xo: add link to homepage
* xcv: add link to homepage
* wuzz: add link to homepage
* wordgrinder: add link to homepage
* wget: add link to homepage
* webtorrent: add link to homepage
* webpack: add link to homepage
* wat2wasm: add link to homepage
* w3m: add link to homepage
* vue: add link to homepage
* vsce: add link to homepage
* virtualboxvm: add link to homepage
* vim: add link to homepage
* vegeta: add link to homepage
* vault: add link to homepage
* valgrind: add link to homepage
* vagrant: add link to homepage
* upx: add link to homepage
* Applying the snake_case convention throughout the repo
- Also removing the file extension where not needed
- Adding {{ }} on a few old pages
* Addressing concerns
- Added {{ }} where they were missed out
- Removed spaces inside {{ }}
- Reverting "file" to "filename" to make it clearer
* Fixing the comments on nc page